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DNA/RNA EDITION
QUESTION #1
In the diagram below, strands I and II represent portions of a DNA molecule.
Strand II would normally include
1.AGC
2.TCG
3.TAC
4.GAT
The CORRECT answer is:
(4)
QUESTION #2
Chromosomes can be described as:
1.large molecules that have only one function
2.folded chains of bonded glucose molecules
3.reproductive cells composed of molecular bases
4.coiled strands of genetic material
The CORRECT answer is:
QUESTION #3
The genetic code of a DNA molecule is determined
by a specific sequence of
1.ATP molecules
2.sugar molecules
3.chemical bonds
4.molecular bases
The CORRECT answer is:
QUESTION #4
In all organisms, the coded instructions for specifying the
characteristics of the organism are directly determined by the
arrangement of the:
1.twenty kinds of amino acids in each protein
2.twenty-three pairs of genes on each chromosome
3.strands of simple sugars in certain carbohydrate molecules
4.four types of molecular bases in the genes
The CORRECT answer is:
QUESTION #5
A single gene mutation would most likely occur if:
1.messenger-RNA molecules temporarily bond to DNA molecules
2.the cytoplasm lacks the amino acids necessary to synthesize a
certain polypeptide
3.a base sequence in a DNA molecule is changed
4.transfer-RNA molecules do not line up properly on a messengerRNA molecule
The CORRECT answer is:
(3)
QUESTION #6
The molecule represented below is found in living things.
Which statement describes one characteristic of this molecule?
1.It is the template for the replication of genetic information.
2.Organic catalysts are made up of these molecules.
3.It is different in each cell of an organism.
4.Cell membranes contain many of these molecules.
The CORRECT answer is:
(1)
QUESTION #7
A chemical known as 5-bromouracil causes a mutation that
results in the mismatching of molecular bases in DNA. The
offspring of organisms exposed to 5-bromouracil can have
mismatched DNA if the mutation occurs in:
1.the skin cells of the mother
2.the gametes of either parent
3.all the body cells of both parents
4.only the nerve cells of the father
The CORRECT answer is:
(2)
QUESTION #8
In a DNA sample, 15% of the bases are thymine (T). What
percentage of the bases in this sample are adenine (A)?
1. 15%
2. 30%
3. 35%
4. 85%
The CORRECT answer is:
(1)
QUESTION #9
Four different segments of a DNA molecule are represented below.
There is an error in the DNA molecule in
1.segment 1, only
2.segment 3, only
3.segments 2 and 3
4.segments 2 and 4
The CORRECT answer is:
(2)
QUESTION #10
Cytochrome c is an enzyme located in the mitochondria of many types of
cells. The number of differences in the amino acid sequences of Cytochrome
c from different species are compared to human Cytochrome c in the data
table below.
Of the organisms listed below, which
one has a DNA code for Cytochrome c
that is most similar to that of a human?
1.tuna
2.chicken
3.moth
4.dog
The CORRECT answer is:
(4)
QUESTION #11
Base your answer to the question on the portion of the mRNA
codon chart and information below.
How would the amino acid sequence produced by the mutant strand (series
II) compare to the amino acid sequence produced by series I?
1.The amino acid sequence would be shorter.
2.One amino acid in the sequence would change.
3.The amino acid sequence would remain unchanged.
4.More than one amino acid in the sequence would change.
The CORRECT answer is:
(2)
QUESTION #12
The diagram represents the organization of genetic
information within a cell nucleus.
The circle labeled Z most likely
represents
1.amino acids
2.chromosomes
3.vacuoles
4.molecular bases
The CORRECT answer is:
(2)
QUESTION #13
The shape of a protein molecule is influenced by
1.whether it is organic or inorganic
2.the sequence of amino acids in it
3.the number of genes found in the nucleus
4.the number of chromosomes in the cell
The CORRECT answer is:
(2)
QUESTION #14
The diagram below shows a molecule of DNA.
What occurs in the process of replication?
1.Structure 1 is hydrolyzed.
2.Chemical bonds are broken in region
3.Structure 3 is synthesized.
4.Proteins are formed in region 2.
The CORRECT answer is:
(2)
QUESTION #15
Which scientists developed the double helix model of the
DNA molecule?
1.Watson and Crick
2.Hardy and Weinberg
3.Darwin and Lamarck
4.Weismann and Miller
The CORRECT answer is:
(1)
QUESTION #16
If Strand I in the diagram represents a segment of a replicating
DNA molecule with bases A-T-C-C-G-A, the complementary
DNA strand would contain the bases:
1.T-A-G-G-C-T
2.T-U-G-G-C-T
3.U-A-G-G-C-U
4.A-T-G-G-C-T
The CORRECT answer is:
(1)
QUESTION #17
A researcher recently discovered a new species of bacteria in the
body of a tubeworm living near a hydrothermal vent. He
compared the DNA of this new bacterial species to the DNA of
four other species of bacteria. The DNA sequences came from
the same part of the bacterial chromosome of all four species.
According to these data, the unknown bacterial species is
most closely related to
1.species I
2.species II
3.species III
4.species IV
The CORRECT answer is:
(4)
QUESTION #18
Hereditary information is stored inside the
1.ribosomes, which have chromosomes that contain
many genes
2.ribosomes, which have genes that contain many
chromosomes
3.nucleus, which has chromosomes that contain
many genes
4.nucleus, which has genes that contain many
chromosomes
The CORRECT answer is:
(3)
QUESTION #19
A mutation occurs in the liver cells of a certain field mouse.
Which statement concerning the spread of this mutation
through the mouse population is correct?
1.It will spread because it is beneficial.
2.It will spread because it is a dominant gene.
3.It will not spread because it is not in a gamete.
4.It will not spread because it is a recessive gene
The CORRECT answer is:
(3)
QUESTION #20
What determines the kind of genes an organism possesses?
1.type of amino acids in the cells of the organism
2.sequence of the subunits A, T, C, and G in the DNA of the
organism
3.size of simple sugar molecules in the organs of the organism
4.shape of the protein molecules in the organelles of the
organism
The CORRECT answer is:
(2)
QUESTION #21
A common practice used by breeders to maintain a desired
trait in dogs is:
1.artificial selection
2.regeneration
3.vegetative propagation
4.sporulation
The CORRECT answer is:
(1)
QUESTION #22
If a set of instructions that determines all of the characteristics
of an organism is compared to a book, and a chromosome is
compared to a chapter in the book, then what might be
compared to a paragraph in the book?
1.a starch molecule
2.an egg
3.an amino acid
4.a DNA molecule
The CORRECT answer is:
(4)
QUESTION #23
A mutation changes a gene in a cell in the stomach of an
organism. This mutation could cause a change in
1.both the organism and its offspring
2.the organism, but not its offspring
3.its offspring, but not the organism itself
4.neither the organism nor its offspring
The CORRECT answer is:
(2)
QUESTION #24
What determines the kind of genes an organism possesses?
1.type of amino acids in the cells of the organism
2.sequence of the subunits A, T, C, and G in the DNA of the
organism
3.size of simple sugar molecules in the organs of the organism
4.shape of the protein molecules in the organelles of the
organism
The CORRECT answer is:
(2)