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Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
during translation, the amino acid detaches from the transfer RNA attaches to the end of a growing protein chain when?
Monday, November 14, 2011 at 7:33pm

science - biology
What is the health advantage that can result in sickle cell hemoglobin?
Sunday, November 13, 2011 at 8:38pm

Biology
When dissecting a fetal pig, how can you tell the difference between veins and arteries? I remember someone saying something about if you poke one, its spongier or something? help! Thank you!
Sunday, November 13, 2011 at 7:05pm

biology
Please help to write a assignment on the topic Biotechnological applications in agriculture and medicine .how to write it?
Sunday, November 13, 2011 at 10:00am

biology
another way to afect the enzyme is lowering the pH of the solution. However, lactase is supposed to be able to work in the stomack. Would lowering the pH of the enzyme solution affect the enzyme? Why or why not?
Friday, November 11, 2011 at 11:12am

biology
The causes of cancer may include which of the following? A. environmental influences B. UV radiation C. viruses D. all of the above
Thursday, November 10, 2011 at 3:37pm

English
I forgot to add these few more things. They are really urgent. Thank you. 1) I told my collegues about the possibility of carrying out a Comenius project on how to write the screenplay and shoot (make) a film. 2) As a matter of fact, they would rather be involved in a project ...
Thursday, November 10, 2011 at 1:51pm

biology
One advantage of electron microscopes over light microscopes is their _____. A. size B. higher magnification C. two-dimensional image D. use of live specimens
Thursday, November 10, 2011 at 11:33am

Biology
What is the difference between beta and alpha glucose.
Wednesday, November 9, 2011 at 8:39am

Biology
Which of the following would increase the chance of a successful infection? A. The host has a strong immune system. B. The pathogen is very virulent. C. The pathogen population at the infection site is small D. A and B E. A, B, and C
Wednesday, November 9, 2011 at 12:31am

Biology
7) The dumping of large amounts of raw sewage into rivers or lakes typically leads to massive fish kills, although sewage itself is not toxic to fish. Similar fish kills also occur in shallow lakes that become covered in ice during the winter. What kills the fish? How might ...
Tuesday, November 8, 2011 at 4:39pm

Biology
6) In detective novels, “the odor of bitter almonds” is the tell-tale clue to murder by cyanide poisoning. Cyanide works by attacking the enzyme that transfers electrons from the respiratory electron transport chain to O2. Why is it not possible for the victim to ...
Tuesday, November 8, 2011 at 4:39pm

Biology
3) How many carbon dioxide molecules are liberated after each cycle of the Krebs cycle? For a single glucose how many carbon dioxide molecules were already liberated by the aerobic respiration at that point?
Tuesday, November 8, 2011 at 4:39pm

Biology
2) Why can it be said that each glucose molecule runs the Krebs cycle twice?
Tuesday, November 8, 2011 at 4:38pm

Biology
4) Explain why organisms do not violate the second law of thermodynamics?
Tuesday, November 8, 2011 at 4:37pm

Biology
Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)? A. Phosphate B. Amino C. Hydroxyl D. Carbonyl E. Carboxyl
Sunday, November 6, 2011 at 10:44pm

Biology
If a protein's primary structure is predetermined or directed by a "source." what might this "source" be?
Sunday, November 6, 2011 at 8:12pm

Biology
There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein molecule consisted of 100 amino acids, how many combinations are possible? What is the probability that out of the total possible combinations of the 100...
Sunday, November 6, 2011 at 8:10pm

Biology
How can you experimentally determine the total volume of blood in a human?
Sunday, November 6, 2011 at 7:02am

Biology
Two parents are blond haired and their children are blond haired. Why is this so?
Sunday, November 6, 2011 at 6:24am

Science-Biology
If a mother has brown eyes and a father has blue eyes why do two of their children have blue eyes and one have brown eyes?
Sunday, November 6, 2011 at 5:29am

English
Could you please check these sentences? Thank you. 1) We're looking for a high school in which subjects such as biology or geography are taught in English so that in the future our students could carry out a project on a common theme in English. 2) I really hope your ...
Saturday, November 5, 2011 at 6:59pm

Science-Biology
To note: all three are blond, ellie's eyes are brown, her brothers are blue. Ellie's father is homozygous for eye colour but her mother is heterozygous. She passed a 'blue eye' gene to the boys and a 'brown eye' gene to Ellie. Brown hair is dominant ...
Saturday, November 5, 2011 at 3:15pm

Biology
I have written an answer for the question below. Why do Ellie and her brothers resemble her parents? Explain how genetic information passes from parents to their offspring. Please check if i have included all the scientific words and if i have explained how genetic information...
Saturday, November 5, 2011 at 8:52am

science-biology
why do we study the human organ system?
Saturday, November 5, 2011 at 5:56am

biology
if offspring exhibit a 3:1 phenotype ratio, what are the genotypes of the parents?
Wednesday, November 2, 2011 at 9:29pm

Science (urgent)
I have 2 biology questions I really need help with, they are due tommorow and I don't know if I'm right. 1)As an energy carrier, ATP differs from NADPH in that: a)ATP carries less energy than NADPH. b)ATP transfers energy through redox reactions whereas NADPH uses ...
Tuesday, November 1, 2011 at 8:29pm

biology
snail in the low oxygen environment what aspects of the new environment will be salient snail and how will aspects act as selective forces
Tuesday, November 1, 2011 at 7:29pm

biology
please can you answer the following questions in as much dephth as possible. why do people use drugs? what are the effects (short & long) of use of hard drugs? the cannabis debate- what is cannabis and why do people use it? what are the risks involved with use? are people more...
Tuesday, November 1, 2011 at 3:27pm

biology
find a drug scandal within a sportig event and write some notes about it.
Tuesday, November 1, 2011 at 2:44pm

biology
how reliable are tests for drugs in sport?
Tuesday, November 1, 2011 at 2:42pm

biology
snail in the low oxygen environment what aspects of the new environment will be salient to your species and how will aspects act as selective forces
Tuesday, November 1, 2011 at 11:51am

Biology
Can genetic mutations also occur within mitochondria and cause diseases? if yes, how common are these diseases?
Monday, October 31, 2011 at 1:52pm

Biology
Does light wavelength affect cellular respiration rate? I know that it affects photosynthetic rate. I think it is not supposed to affect cellular respiration rate, but I recently conducted an experiment that has proved otherwise and I just want to make sure about the facts ...
Monday, October 31, 2011 at 1:15am

Statistical significance (Chi squared)Please check
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 7:36pm

Statistical significance test
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 5:57pm

Calculating Chi Squared
did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 3:57pm

Calculating Chi Squared
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Saturday, October 29, 2011 at 6:34pm

Statistical significance (Chi squared)
I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for chi^2 is Calculating Chi Squared - Catherine, Friday, October 28, 2011 at 8:15pm I did a biology experiment where I need to analyze the ...
Saturday, October 29, 2011 at 3:59pm

Biology
the biome with the fewest seasonal changes is?
Saturday, October 29, 2011 at 2:48pm

English
1) Writeacher, I need the help of a science teacher to find a theme high-school students (aged 16 and 17) can investigate with their German and French partners. Our students study biology (also bilotechnologies) , chemistry, and earth science. 2) Can you check these two ...
Saturday, October 29, 2011 at 9:01am

biology
I really need help i am so confued !! use the crossover values given to calculate the sequence and the distance apart of the genes indicated P-m 7% K-m 28% P-K 21% m-C 5%
Saturday, October 29, 2011 at 12:29am

Biology
i really need help i am so stuck!! use the crossover values given to calculate the sequence and the distnace apart of the genes indicated p-m 7% K-M 28% p-k 21% m-C 5%
Friday, October 28, 2011 at 11:38pm

Biology 110
Displacement of O2 from its respiratory pigment: A. occur more rapidly in cold temp. B. occur more slowly when Ph alkaline. C. occur more slowly when O2 tissue level low. D. none of these.
Friday, October 28, 2011 at 9:05pm

Biology 110
True or false 1. Warm temp increase the release of CO2 from hemoglobin in the peripheral circulation. 2.Exchange of respiratory gases is by diffusion as a result of concentration gradient. 3. Residual air is necessary to maintain patent alveoli and prevent lung collapse.
Friday, October 28, 2011 at 8:59pm

Biology 110
by means of a chemical equation, show how the body rids itself of the major end-products of metabolism. Please explain.
Friday, October 28, 2011 at 8:56pm

Calculating Chi Squared
I did a biology experiment and I have to use the chi^2 method to calculate statistical significance. I got data at different time points and I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for ...
Friday, October 28, 2011 at 7:06pm

biology
what is the promoter sequence for transcription? in regards to nucleotides
Friday, October 28, 2011 at 5:22pm

biology
list two types of active transport that use specific protein recognition
Friday, October 28, 2011 at 5:16pm

biology
why is glucose converted into hexose bisphosphate in glycolysis ??
Friday, October 28, 2011 at 3:30pm

biology 1
what kind of elecrtical charge is found on the oxygen atom of a polar water molecule
Friday, October 28, 2011 at 2:43pm

Biology
1) What is the minimum number of single nucleotide substitutions that would be necessary for each of the following amino acid replacements? a. trp -> lys b. met -> his c. tyr -> gly d. ala -> asp   2) A mutation is isolated that can not be induced to revert. ...
Friday, October 28, 2011 at 11:38am

Biology
Which of the following is not a benefit of genetic counseling: a.It helps identify parents at risk for having children with genetic defects. b.It assists parents in deciding whether or not to have children. c.It is based exclusively on family pedigrees. d.It helps identify ...
Friday, October 28, 2011 at 10:01am

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Friday, October 28, 2011 at 12:16am

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 at 8:58pm

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 at 8:00pm

9th grade Biology
4. After the temperature reaches 33 degrees Celcius, the rate of photosynthesis declines. Using knowledge of enzymes, explain why this happens. 6. As the amound of CO2 increases, what would happen to the rate of photosynthesis? And as the amount of CO2 increases, would the ...
Thursday, October 27, 2011 at 7:04pm

Biology
If a male's left vas deference is blocked. how is his sperm count affected? Explain you answer .. well wt i know is that the sperm count would decrease as less sperm moves from the epididyms into the urethra.
Thursday, October 27, 2011 at 2:59pm

Biology
What are the positive and negative impacts on biodiversity? I can't seem to find too much online. If you can give a short description of each it would be appreciated but not necessary!
Thursday, October 27, 2011 at 3:54am

Biology 110
Name the 4 functions of the respiratory system. 1. 2. 3. 4.
Wednesday, October 26, 2011 at 8:58pm

Biology 110
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 at 8:43pm

Biology 110
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 at 8:43pm

biology 110
name 4 functions of the nose.
Wednesday, October 26, 2011 at 8:30pm

biology
Name 4 functions of the respiratory system.
Wednesday, October 26, 2011 at 8:29pm

biology
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 at 8:28pm

biology
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 at 8:26pm

biology
Name the 4 factors that control the amount and rate of gas exchange.
Wednesday, October 26, 2011 at 8:23pm

Biology
In guinea pigs, gene B is for black, b is for white the heterozygote is a mixture, called agouti. ( sex linked and non dominant) , a litter consists of 5 agouti females and 6 black males , if the parents of this litter had more offspring , what other phenotypes would you ...
Wednesday, October 26, 2011 at 4:34pm

Biology
In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances of their children ...
Wednesday, October 26, 2011 at 4:31pm

Biology
Suppose that a clolur blind man has parents with normal vision. Would all his sons be colour-blind ? Was his mother a carrier ? would all his daughters be carriers
Wednesday, October 26, 2011 at 4:28pm

Biology
My teacher asked me this question and I do not know the answer would you be able to tell me and why thank you large bodies loose a smaller percentage of heat to their surroundings than smaller bodies. Why?
Wednesday, October 26, 2011 at 8:39am

Biology
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?
Wednesday, October 26, 2011 at 12:07am

biology
You are conducting an experiment to determine whether lichen populations are affected by local airborne pollutants. Which of the following observations would best support your hypothesis that high levels of airborne pollutants cause a reduction in lichen abundance: a) lichens ...
Tuesday, October 25, 2011 at 11:11pm

Biology, Art
I was doing some research for a wildlife art contest in January and I can't seem to find a specific bit of information that is crucial to my painting. The contest requires me to paint a Greater Short Horned Lizard (Phrynosoma hernandesi) and I know that some species of ...
Monday, October 24, 2011 at 10:07pm

Biology
Locate a diagram of an organism with the main organs and structures labeled. Locate a diagram of an organism with the main organs and structures labeled. Briefly explain how the organism in the diagram has evolved physiologically to become suited to its enviroment
Monday, October 24, 2011 at 2:45am

Biology/math?
If ‘pi’ is approximately 3.14, and your field of view is 3 mm in diameter, what is the area of your field of view?
Monday, October 24, 2011 at 12:18am

Biology
Select two signal mechanisms that activate transcription in response to an external signal. Any of these systems ultimately activates a transcription factor. For each of the systems you have selected, trace the route from signal binding to receptor to the final transcription ...
Sunday, October 23, 2011 at 7:21pm

biology
Someone has just given you the cDNA for GFP and you would like to design a construct that would result in GFP becoming resident within the ER. What would you do to this cDNA that would result in this final location. Explain.
Sunday, October 23, 2011 at 7:20pm

biology
Would you expect the fraction of bacteria that are spontaneous rifampin resistant mutants to be higher or lower in a culture that: you had propagated many times or one you had just started from a single colony of sensitive bacteria? Why?
Sunday, October 23, 2011 at 4:45pm

BIOLOGY
HOW COULD USING AQUACULTURES IMPACT THE BIODIVERSITY OF WILD FISH POPULATIONS?
Sunday, October 23, 2011 at 3:17pm

BIOLOGY
WHAT ARE TWO LEVELS OF BIODIVERSITY THAT WE FIND IN AN ECOSYSTEM?
Sunday, October 23, 2011 at 2:06pm

Biology
What is the difference between multiple gene inheritance and multiple allele inheritance
Sunday, October 23, 2011 at 12:58am

Biology
Explain how an individual can be a carrier for a oarticular disease yet not have the disase. Is this explanation true for all people who are carriers
Saturday, October 22, 2011 at 12:00am

biology
What are the major reservoirs of organic carbon on earth?
Friday, October 21, 2011 at 1:41am

biology
what questions do affected people, potential parents, and families face when a diagnosis of the sickle cell anemia is made
Thursday, October 20, 2011 at 8:08pm

English
I urgently need your help to translate this school profile into English. Thank you. I included another sentence, too. 1) Students aged between sixteen and eighteen can opt for the bilingual branch (??) and study subject like Geographie/Earth Science, biology and history in ...
Thursday, October 20, 2011 at 4:54pm

Biology
You are supposed to add 0.1 mol of a substance with molecular weight = 354.9 to 1 liter of water. How much should you add? Choose one.
Thursday, October 20, 2011 at 10:00am

Biology
Difference between medukka and pyramid in a kidney?(:
Wednesday, October 19, 2011 at 10:36pm

Biology
Do plants make their own cell wall or is it already there ?
Wednesday, October 19, 2011 at 9:19pm

biology
List 2 ways in which prokaryotic and eukaryotic cells are alike and 2 ways in which they are different. Is this correct? Alike= cell membrane and DNA Different=ribosomes and mitochondria
Wednesday, October 19, 2011 at 8:06pm

biology
List 2 ways in which prokaryotic and eukaryotic cells are alike and 2 ways in which they are different. Is this correct? Alike= cell membrane and DNA Different=ribosomes and mitochondria
Wednesday, October 19, 2011 at 7:51pm

Biology
What is Parkinson's & Alzheimer's disease? Explain each based on their causative agent,means of transsmission,prevention&control.
Wednesday, October 19, 2011 at 12:53pm

Biology
A lilly from a true-breeding line with white flowers and short corollas (line A) is crossed to a lilly from a true-breeding line with black flowers and long corollas (line B). The resulting offspring, the F1, are all red-flowered, with corollas of medium length. a) Suppose an ...
Tuesday, October 18, 2011 at 11:02pm

biology
In some breeds of dogs, a dominant gene B controls the trait of barking. If a breeder wants to produce a true-breeding strain of barkers, but knows that the allele for silent dogs (b) is present amongst the barking dogs in his kennels, how could he determine which of his ...
Tuesday, October 18, 2011 at 2:12am

biology
A woman has difficulty becoming pregnant and when her karyotype is examined it is found that she is heterozygous for a large reciprocal translocation between her second and seventh chromosomes. a) is it possible for her to have a child? b) How can her infertility be explained...
Monday, October 17, 2011 at 10:41pm

Biology
In drosophila , short wings , and black colour are reccessive traits.long wings and grey colour are dominant. show the cross results between a short winged , heterozygous grey fly and a heterzygous long winged grey fly
Monday, October 17, 2011 at 10:22pm

biology
An individual with Down's syndrome has repeat length alleles of size 8, 13, and 14 for a microsatellite near the centromere of chromosome 23. Her mother is homozygous for the 13 repeat allele. Her father is heterozygous for 8 and 14. What can we say about the origin of ...
Monday, October 17, 2011 at 10:19pm

biology
Suppose we want to maintain a large number of homozygous lethal chromosomes, exposed to chemical mutagens, for a mutation screening experiment in a small orb web building spider species. One of these lines has a dominant mutant named Disordered (D) that results in “messy...
Monday, October 17, 2011 at 10:18pm

Biology
All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from leaking out of ...
Monday, October 17, 2011 at 7:46pm

Biology
Which root system is most effect anchor? And which is the most effective for storage of nutrients, why? I thought that the best anchor would be the taproot but I don't know how to figure out which is best for storing nutirents?
Monday, October 17, 2011 at 7:06pm

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