I answered the questions, but I don't know if my choices are right.
1) Which of the following is an acidic pH?
6
7
8
800
None of the Above
Answer: 6
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2) Which of the following is directly produced by photosynthesis?
Glucose and oxygen
Carbon dioxide and water
Oxygen and water
Glucose and carbon dioxide
Energy in the form of ATP
Answer: Glucose and Oxygen
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3) A bacterium lacks which of the following structures or components?
Plasma membrane
Cell wall
Ribosomes
DNA
Nucleus
Answer: Nucleus
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4) The plasma membrane is made up of which of the following?
Protein only
Protein and RNA
Phospholipids only
Phospholipids and proteins
DNA only
Answer: Phospholipids and Proteins
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5) Which statement about linkage of genes is false?
Genes on the same chromosome are said to be linked
Genes on the same chromosome assort independently
Crossing over between two linked genes can alter phenotypes of progeny
Crossing over results in recombinant phenotypes
Genes on the same chromosome that are far apart have a higher recombination frequency than those that are close together
Answer: Genes on the same chromosome assort independently
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6) Genes located on mitochondrial DNA are usually inherited
randomly.
from the mother.
from the father.
evenly from both the mother and the father.
by independent assortment.
Answer: from the mother
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7) Which component is required for the initiation of transcription?
The start codon AUG
Promoter DNA sequence
Ribonucleoside triphosphates
Terminator DNA sequence
DNA polymerase
Answer: Promoter DNA
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8) Put the following four steps of eukaryotic gene expression in order, from beginning to end.
(1) Pre-mRNA is processed to make mRNA.
(2) Ribosomes translate the mRNA sequence to make proteins.
(3) mRNA is transported to the cytoplasm.
(4) DNA is used as a template to make pre-mRNA.
1; 4; 3; 2
4; 3; 1; 2
4; 1; 3; 2
4; 1; 2; 3
1; 2; 4; 3
Answer: 4,1,3,2
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9) RNA polymerases differ from DNA polymerases in that
RNA polymerases do not require a template
RNA polymerases use deoxyribonucleoside triphosphates as substrates
DNA polymerases use ribonucleoside triphosphates as substrates
RNA polymerases are less effective at proofreading than DNA polymerases
Only DNA polymerases are processive
Answer: RNA polymerases are less effective at proofreading than DNA polymerases
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10) The site on the chromosome occupied by a gene is called
Allele
Region
Locus
Type
Phenotype
Answer: Locus
You have far too many questions for one post. Here is the information for the first one.
pH < 7 = acid
pH > 7 = base
pH = 7 = neutral.
Yes, 1 and 2 are right.
To determine if your choices are correct, we can go through each question and explain how to arrive at the correct answer.
1) Which of the following is an acidic pH?
The correct answer is 6. pH measures the acidity or alkalinity of a solution, with 7 being neutral. Anything below 7 is considered acidic. In this case, the pH 6 is lower than 7, so it is acidic.
2) Which of the following is directly produced by photosynthesis?
The correct answer is Glucose and Oxygen. During photosynthesis, plants convert sunlight energy into chemical energy in the form of glucose. Oxygen is also produced as a byproduct of photosynthesis.
3) A bacterium lacks which of the following structures or components?
The correct answer is Nucleus. Bacteria are prokaryotic organisms and lack a true nucleus. Instead, their genetic material is found in a region called the nucleoid.
4) The plasma membrane is made up of which of the following?
The correct answer is Phospholipids and Proteins. The plasma membrane is composed of a double layer of phospholipids, with proteins embedded within or attached to the phospholipid bilayer.
5) Which statement about linkage of genes is false?
The correct answer is Genes on the same chromosome assort independently. Genes located on the same chromosome are said to be linked and tend to be inherited together. Therefore, they do not assort independently during inheritance.
6) Genes located on mitochondrial DNA are usually inherited
The correct answer is from the mother. Mitochondrial DNA is predominantly inherited from the mother. During fertilization, the mitochondria in the egg cell contribute to the mitochondria in the offspring.
7) Which component is required for the initiation of transcription?
The correct answer is Promoter DNA sequence. The promoter sequence in DNA provides the binding site for RNA polymerase to initiate transcription.
8) Put the following four steps of eukaryotic gene expression in order, from beginning to end.
The correct answer is 4, 1, 3, 2. The order is as follows:
1) DNA is used as a template to make pre-mRNA (transcription).
2) Pre-mRNA is processed to make mRNA.
3) mRNA is transported to the cytoplasm.
4) Ribosomes translate the mRNA sequence to make proteins.
9) RNA polymerases differ from DNA polymerases in that
The correct answer is RNA polymerases are less effective at proofreading than DNA polymerases. DNA polymerases have proofreading capabilities to correct errors during replication, while RNA polymerases do not possess the same level of proofreading ability.
10) The site on the chromosome occupied by a gene is called
The correct answer is Locus. The locus refers to the specific physical location on a chromosome where a particular gene is located.
By understanding the explanations provided above, you can verify if your choices align with the correct answers.