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October 25, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
Draw a picture of the structure of an atom that includes all the following: protons, neutrons, electrons, nucleus, orbitals
Wednesday, November 20, 2013 at 6:10pm

HELP Biology
To find out which key will open a lock, you try several until one works. This kind of learning is called ________________________. I have no clue
Wednesday, November 20, 2013 at 12:03pm

Biology
The half-life of carbon-14 is 5,700 years. If a sample originally had 26 g of carbon-14, how much would it contain after 22,800 years?
Tuesday, November 19, 2013 at 6:15pm

biology - cells
Which scientist proposed that cells come from other cells? A. Hooke B. van Leeuwenhoek C. Schwann D. Virchow
Monday, November 18, 2013 at 10:50pm

biology
Which of the following is not produced in the light-dependent reactions of photosynthesis? A. NADPH B. sugars C. ATP D. oxygen
Monday, November 18, 2013 at 9:51pm

biology
What segregations comprise the cloaca, and what are their functions? How does this cloacal region differ from that of most mammals?
Monday, November 18, 2013 at 11:13am

biology
Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a "single ...
Monday, November 18, 2013 at 10:19am

biology
Mutant C: Suppose an A/T base pair was inserted in between the two G/C base pairs at positions 18 and 19, marked by the letters above and below the strands. What would the amino acid sequence of the resulting protein be? Be sure to enter the sequence N- to -C from left to ...
Monday, November 18, 2013 at 10:04am

biology
Mutant C: Suppose an A/T base pair was inserted in between the two G/C base pairs at positions 18 and 19, marked by the letters above and below the strands. What would the amino acid sequence of the resulting protein be? Be sure to enter the sequence N- to -C from left to ...
Monday, November 18, 2013 at 10:02am

BIOLOGY
You plan to generate many copies of this gene by PCR. You will then insert the PCR product into the plasmid. d) Which two primers from the list below will allow you to use PCR to amplify this gene? Check the two that apply. 5'-GTGCA-3' 5'-CACGT-3' 5'-TATGG-...
Sunday, November 17, 2013 at 10:15pm

BIOLOGY
b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a "...
Sunday, November 17, 2013 at 10:11pm

Biology: Endotoxin
Does endotoxin refer to the LPS or to lipid A?
Sunday, November 17, 2013 at 9:20pm

biology mit
b) Make a single base pair substitution mutation in the gene below that results in a protein that is shorter than the protein produce by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a "...
Sunday, November 17, 2013 at 1:53pm

biology
Which photosystem-1 or 2-most likely evolved first?
Saturday, November 16, 2013 at 9:28pm

biology
Small gene big plasmid Question 2 Part E wrong. Question 2 Part F Determine the DNA sequence of PCR products. I do not understand how to handle this problem. On home works they were wrong and the solutions were confusing. Please give me a clue.
Saturday, November 16, 2013 at 6:06pm

biology
ou sequence many of the recombinant plasmids generated. You find three mutant versions of the inserted gene. (This is likely due to errors introduced during the PCR amplification.) The sequences of the gene found in the three mutants are given below. Consider each of the ...
Friday, November 15, 2013 at 10:12am

A/P Biology
The Echinopsis mamillosa is a flowering cactus native to Bolivia. A high-rise building is built near a particular Echinopsis, filtering the amount of direct sunlight it receives. Which of the following processes is negatively affected first by the reduction in sunlight? ...
Thursday, November 14, 2013 at 10:38pm

Science! Biology 1
Question: Which of following best describes the free-energy requirements of an organism? Answer Choices: During times of hibernation large amounts of free energy are required. Free-energy demand is consistent for all heterotrophs. The organism requires free energy in all ...
Thursday, November 14, 2013 at 10:36pm

biology
Given three restriction enzymes, cuts and base pairs on the plasmid map. How do you apply this information to a autoradiogram of sequencing gel? Also, include the band locations.
Thursday, November 14, 2013 at 12:02pm

biology
can you give examples of analogous structures????? please i have tried about 4 differet websites and no one has helped
Thursday, November 14, 2013 at 11:03am

Biology ! Please help!
Why do chromosomes form and what kind of proteins do they combine with?
Tuesday, November 12, 2013 at 5:49pm

biology
polar molecule are soluble in water. how does this activity demonstrate polarity of molecule that contain the -OH group. our activity was to do an experiment mixing 2 diff liquids together to see if they dissolve and tell if its polar or nonpolar. 1. water and oil= polar 2. ...
Tuesday, November 12, 2013 at 5:47pm

Biology
In DNA fingerprinting, the DNA probe that is used is ______to the DNA sequence of the repeats in the sample? im guessing amplify????
Tuesday, November 12, 2013 at 12:45pm

Biology
Please help! i was wondering why a genome size determined in a lab would be smaller than that of the actual. thanks
Tuesday, November 12, 2013 at 7:18am

Biology
How are antibodies used to detect similarities in protein sequences?
Monday, November 11, 2013 at 10:22pm

Biology
why do we use protein sequences when comparing genetic similarities?
Monday, November 11, 2013 at 10:21pm

biology
Is their a relationship between strength and independent mobility? Can a spinal cord injury affect he body permanently?
Sunday, November 10, 2013 at 8:46pm

Biology
What are the inputs and outputs of the proton pump?
Saturday, November 9, 2013 at 10:18pm

BIOLOGY
Consider the following 45 base-pair (bp) DNA sequence: 1 10 20 30 40 | . | . | . | . | . 5’-CGCACCTGTGTTGATCACCTAGCCGATCCACG​GTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||​||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGC​CACCTAGGTTCCG-5&#...
Friday, November 8, 2013 at 3:27pm

Biology
How would u expect the number of mitochondria in a cell to be related to the amount of active transport it carries out? Please help!
Friday, November 8, 2013 at 11:52am

biology
many human-caused losses of biodiversity, such as habitat destruction and of invasive species. are there any natural events that could alter the diversity index?
Friday, November 8, 2013 at 4:04am

Biology!!!
In humans, short fingers and widow's peak are dominant over long fingers and straight hairline. A heterozygote in both regards reproduces with a similar heterozygote in both regards reproduces with a similar heterozygote. What is the chance of any one child having the ...
Thursday, November 7, 2013 at 7:13pm

Biology
What polymers are found commonly in cells? Additionally, what monomers make up those polymers?
Wednesday, November 6, 2013 at 8:27pm

biology
Enzymes in the human body work in a very wide range of conditions. A. True B. False
Wednesday, November 6, 2013 at 8:10pm

biology
Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by becoming part of the ...
Wednesday, November 6, 2013 at 8:09pm

biology
an experiment, a scientist notices that an enzyme’s catalytic rate decreases when the pH of the environment is changed. Which of the following best summarizes the effect of pH on the enzyme? A. pH changes the shape of the enzyme. B. pH takes energy away from the enzyme, ...
Wednesday, November 6, 2013 at 8:08pm

biology
if there is no oxygen for the glycolysis what process would that be called?
Wednesday, November 6, 2013 at 6:37pm

biology
Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­​­_____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on ...
Wednesday, November 6, 2013 at 3:42pm

biology
Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above
Wednesday, November 6, 2013 at 3:40pm

biology
Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above
Tuesday, November 5, 2013 at 8:14pm

biology
Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­​­_____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on ...
Tuesday, November 5, 2013 at 7:37pm

biology
Why is it good for plants on the forest floor to have larger leaves but could be harmful to the trees above?
Tuesday, November 5, 2013 at 5:52pm

psy/340
I need help answering this question please. Discuss the influences of biology and the environment on sexual differentiation.
Tuesday, November 5, 2013 at 4:17am

Biology ms. sue
ms. sue can you give me link to some pictures it says give description of the species including both sexes and their younger life stages for animals include images.
Monday, November 4, 2013 at 2:27pm

Biology
How do Eukaryotes package their gene products?
Monday, November 4, 2013 at 12:15am

Biology
"Quiglilies" are a rare variety of flower. They have one allele for orange petal colour O. They also have another allele for white petals W. These alleles have a co-dominant relationship producing a yellow petal colour. i) what are the possible genotypes and ...
Friday, November 1, 2013 at 10:00pm

Biology
The production of a polypeptide involves the correct sequencing of amino acids, originally encoded by a segment of DNA. This code is transcribed onto mRNA and subsequently translated using tRNA. From the following DNA segment, record the base sequence that would be encoded on ...
Friday, November 1, 2013 at 9:55pm

Biology
What could be a benefit for a plant that can switch between cyclic and non-cyclic electron transport? Think about the products of electron transport and what products are needed for the Calvin Cycle.
Friday, November 1, 2013 at 6:29pm

Biology
How are bryophytes similar to green algae? How are they different?
Thursday, October 31, 2013 at 12:36pm

Biology
What information does relative dating provide?
Thursday, October 31, 2013 at 12:19pm

biology
if DNA replication were conservative, what sort of bands would you expect from the CsCl density gradient centrifugation?
Thursday, October 31, 2013 at 1:37am

biology
what is one example of a specific case used by scientists for organ cloning?? (therapeutic cloning)
Wednesday, October 30, 2013 at 8:13pm

Biology 20
I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a step that could be added to the procedure to isolate a specific compound for chemical testing.' What step could I use?
Wednesday, October 30, 2013 at 6:46pm

biology
If a person with Down syndrome marries a person without Down syndrome, is it possible for their child not to have Down syndrome? I assume that there is a 50% chance that they could have a child that will not have down syndrome. Is this correct?
Wednesday, October 30, 2013 at 10:45am

grade 11 biology
Consider a germ cell of a person with Down syndrome(Trisomy 21). Explain what is happening with the arrangement of chromosome 21 inside the cell during interphase 1, Anaphase 1, Telophase 1, telophase 11. Please help, I am really stuck on this. Thank you
Wednesday, October 30, 2013 at 8:16am

Biology
If the axo-membrane becomes more permeable to potassium Ions. What would happen?
Tuesday, October 29, 2013 at 2:20pm

Biology
How does having a large, sweet fruit benefit a plant?
Tuesday, October 29, 2013 at 1:26pm

biology
Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?
Monday, October 28, 2013 at 11:32pm

Biology
Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?
Monday, October 28, 2013 at 11:01pm

biology
The primary structure of proteins is often described as "amino acids connected like beads on a string". In this same vein, which of the following images best describes a protein's quaternary structure?
Monday, October 28, 2013 at 3:11pm

Biology
What would happen if you ran the same sample of DNA as your first experiment but used different primers?
Monday, October 28, 2013 at 1:52am

Biology
organelles with an abundance of carotenoids but no chlorophyll
Friday, October 25, 2013 at 4:38pm

Biology
I do not understand what visible and sharp focus mean. The instruction says.... When viewing the crossed hairs and the top hair is in sharp focus, is the other hair visible or in sharp focus at the following total magnification...?
Friday, October 25, 2013 at 4:37pm

Biology
I do not understand what visible and sharp focus mean. The instruction says.... When viewing the crossed hairs and the top hair is in sharp focus, is the other hair visible or in sharp focus at the following total magnification...?
Friday, October 25, 2013 at 12:44pm

Biology
organelles with an abundance of carotenoids but no chlorophyll
Friday, October 25, 2013 at 12:05pm

biology
Covalent bonds are not affected by chemical reactions. true ir false
Thursday, October 24, 2013 at 9:26pm

biology
What are the reactants in the following chemical formula? C6H12O6 + 6O2 ¨ 6CO2 + 6H2O
Thursday, October 24, 2013 at 6:50pm

Biology
What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will become clogged with the ...
Thursday, October 24, 2013 at 2:54am

Biology
Could someone please explain Endocytosis(phagocytosis, pinocytosis and receptor-mediated endocytosis) in simplest way? I do not understand
Wednesday, October 23, 2013 at 5:16pm

Biology 101
1. Which of the following statements is incorrect about homologous chromosomes? a. Homologous chromosomes are similar but not identical b. Homologous chromosomes have the same size and function c. Homologous chromosomes contain genes for the same kind of protein products d. ...
Wednesday, October 23, 2013 at 1:05pm

biology
4. Using sunscreen and consuming energy drinks involve _____________________. A. using biological information to make informed decisions B. risks to using biotechnology C. using genomics to make informed decisions D. all of the above
Wednesday, October 23, 2013 at 11:55am

biology
A sheep with human genes spliced into it to produce human antibodies is an example of a(n)
Wednesday, October 23, 2013 at 11:54am

Biology
PLEASE CONSIDER EACH OF THE FOLLOWING CHANGES SEPARATELY. Be sure to enter the sequence using the 3-letter abbreviations (for example, Ala-Gly-Ser), where the left most amino acid of your answer represents the first amino acid of the polypeptide. Another way to say this is: be...
Wednesday, October 23, 2013 at 7:51am

biology
Is carbonic acid (H2CO3) organic or inorganic molecule?
Wednesday, October 23, 2013 at 4:30am

biology
Is carbonic acid (H2CO3) organic or inorganic?
Wednesday, October 23, 2013 at 4:30am

math
the biology class has a lab every days. the earth science class has a lab every three days . which class day do they both have class ?
Tuesday, October 22, 2013 at 6:26pm

Biology
Your thermocycler is broken, and can only reach a temperature of 72 degrees Celsius maximum. What effect will this have on your PRC? Will you still get DNA replicated? Explain
Monday, October 21, 2013 at 11:37pm

Biology
Why wasn't PCR possible until Taq polymerase was discovered?
Monday, October 21, 2013 at 2:01pm

Biology
In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32 c. 16 d. 8 e. 4 If a cell has 20 chromosomes in G1, how many chromatids will be present during prophase? a. 30 b. 20 c. 5 d. 40 Which of the following ...
Monday, October 21, 2013 at 12:51pm

biology (Help please!!!)
1. If a student pours a solution of salt water on an elodea leaf, what is it an example of? 2.A child pours salt crystals on the body of a slug he finds in the backyard. Options are: high concentration, low concentration, osmosis, diffusion, hypertonic solution, and hypotonic ...
Sunday, October 20, 2013 at 11:54pm

Biology
Which of the following cells check for during the G2 check point? a. Growth hormone c. DNA integrity b. Nutritional status d. Cell size In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32 c. 16 d. 8 e. 4 The X...
Sunday, October 20, 2013 at 11:24pm

Biology
single celled prokaryotes like the bacteria and archaea are the dominant and most diversified groups of living forms today. does this support their ancient origins? Explain
Sunday, October 20, 2013 at 7:34pm

Biology
I am having a really hard time understanding respiration and photosynthesis. Is there a simple explanation for both processes?
Sunday, October 20, 2013 at 1:28pm

biology
Stuck on this question. When infected by the Hepatitis B virus (HBV), many patients experience flu-like symptoms such as fever, loss of appetite, nausea, vomiting, and malaise. This is called acute hepatitis. During this stage, what is the HBV doing? What do you call this ...
Saturday, October 19, 2013 at 3:06pm

biology need help
3 factors the could produce bias in an experiment
Saturday, October 19, 2013 at 12:21pm

Biology/Chem
Soy sauce is prepared by fermenting a salted mixture of soybeans and wheat with several microorganisms including yeast over a period of 8-10 months. After the solids are removed, the resulting sauce is rich in lactic acid and ethanol. How aere these 2 compounds produced? In ...
Saturday, October 19, 2013 at 9:56am

need help biology
3 factors the could produce bias in an experiment
Friday, October 18, 2013 at 7:15pm

biology
3 factors the could produce rats
Friday, October 18, 2013 at 6:40pm

biology need help
Which variable does the scientists or you deliberately change? Dependent, Independent, control is is independent Which variable does the scientists measure? Dependent, Independent, control is it dependent 6. Which variable remains the same/constant throughout the experiment? ...
Friday, October 18, 2013 at 6:36pm

biology
Which variable does the scientists or you deliberately change? Dependent, Independent, control is is independent Which variable does the scientists measure? Dependent, Independent, control is it dependent 6. Which variable remains the same/constant throughout the experiment? ...
Friday, October 18, 2013 at 10:05am

biology
Hi there, Not sure the answer for this question. In what way is endospores stronger than bacterial cell?
Friday, October 18, 2013 at 9:21am

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis
Thursday, October 17, 2013 at 7:24pm

biology
What is the sequence of the stop codon?
Thursday, October 17, 2013 at 7:20pm

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis
Thursday, October 17, 2013 at 7:18pm

cor biology
Substance X has a molar extinction coefficient (E) of 4725 l.mol-1. How many moles of X are needed to produce an absorbance of 1.0 in a 1 ml cuvette?
Wednesday, October 16, 2013 at 12:42pm

Biology
The lack of nutrients and molecular building blocks, cells not secreteing materials normally and improper ion balance are results of which organelle not functioning properly
Wednesday, October 16, 2013 at 9:34am

Biology
What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)
Tuesday, October 15, 2013 at 8:56pm

Biology
What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)
Tuesday, October 15, 2013 at 8:36pm

biology
The frequency of carriers of this disease is 0.02 in a particular population. Consider many couples like 6 and 7 where one parent is affected and the other is unaffected. On average, what is the chance that the first child of these couples will be affected? Please give a ...
Monday, October 14, 2013 at 3:58pm

Biology
Father has red/green color blindness and is a hemophiliac. Mother is normal. Have two female children (Both are probably carriers). One female offspring marries a normal male. The question is what is the probability that their son is both color blind and hemophiliac? ...
Monday, October 14, 2013 at 9:51am

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