Biol 4003 || Errorless Answers 100%.
Which of the following is not one of the four criteria that the genetic material must fulfill to
function as the genetic material?
A. Store information
B. Replication
C. DNA repair
D. Transmission correct answers C. DNA repair
Which component(s) of a nucleotide is/are found along the DNA backbone?
A. bases
B. deoxyribose and bases
C. phosphate
D. deoxyribose and phosphate correct answers D. deoxyribose and phosphate
3. Which of the following could be the components of a single nucleotide found within a DNA
strand?
A. ribose, thymine, and phosphate
B. deoxyribose, uracil, and phosphate
C. deoxyribose, thymine, and phosphate
D. deoxyribose, guanine, and three phosphates correct answers C. deoxyribose, thymine, and
phosphate
4. Which of the following bases is not found in RNA?
A. thymine
B. guanine
C. cytosine
D. uracil correct answers A. thymine
, Chargaff's results suggests that (in DNA),
A. the amount of G = C and A = T.
B. the amount of G = A = C = T.
C. the amount of G = T and A = C.
D. all of the above. correct answers A. the amount of G = C and A = T.
In a DNA strand, a phosphate connects a 3' carbon atom in one deoxyribose to
A. a 5' carbon in an adjacent deoxyribose.
B. a 3' carbon in an adjacent deoxyribose.
C. a base in an adjacent nucleotide
D. none of the above. correct answers A. a 5' carbon in an adjacent deoxyribose.
Two circular DNA molecules are topoisomers of each other; they contain the same amount of
DNA. Let's call them DNA-1 and DNA-2. Under the electron microscope, DNA-1 appears more
compact compared to DNA-2. The level of gene transcription is much lower for DNA-2. Which
of the following three possibilities would best explain these observations?
A. DNA-1 has 4 negative supercoils and DNA-2 has 2 positive supercoils.
B. DNA-1 has 4 positive supercoils and DNA-2 has 2 negative supercoils.
C. DNA-1 has 2 positive supercoils and DNA-2 has 4 negative supercoils.
D. DNA-1 has 2 positive supercoils and DNA-2 has 2 negative supercoils. correct answers A.
DNA-1 has 4 negative supercoils and DNA-2 has 2 positive supercoils.
When two closely related species (like two salamanders) differ greatly in their total amount of
DNA, this is usually due to
A. the presence of many more genes in one of the species.
B. the presence of many more repetitive sequences in one of the species.
C. much longer introns in one of the species.
Which of the following is not one of the four criteria that the genetic material must fulfill to
function as the genetic material?
A. Store information
B. Replication
C. DNA repair
D. Transmission correct answers C. DNA repair
Which component(s) of a nucleotide is/are found along the DNA backbone?
A. bases
B. deoxyribose and bases
C. phosphate
D. deoxyribose and phosphate correct answers D. deoxyribose and phosphate
3. Which of the following could be the components of a single nucleotide found within a DNA
strand?
A. ribose, thymine, and phosphate
B. deoxyribose, uracil, and phosphate
C. deoxyribose, thymine, and phosphate
D. deoxyribose, guanine, and three phosphates correct answers C. deoxyribose, thymine, and
phosphate
4. Which of the following bases is not found in RNA?
A. thymine
B. guanine
C. cytosine
D. uracil correct answers A. thymine
, Chargaff's results suggests that (in DNA),
A. the amount of G = C and A = T.
B. the amount of G = A = C = T.
C. the amount of G = T and A = C.
D. all of the above. correct answers A. the amount of G = C and A = T.
In a DNA strand, a phosphate connects a 3' carbon atom in one deoxyribose to
A. a 5' carbon in an adjacent deoxyribose.
B. a 3' carbon in an adjacent deoxyribose.
C. a base in an adjacent nucleotide
D. none of the above. correct answers A. a 5' carbon in an adjacent deoxyribose.
Two circular DNA molecules are topoisomers of each other; they contain the same amount of
DNA. Let's call them DNA-1 and DNA-2. Under the electron microscope, DNA-1 appears more
compact compared to DNA-2. The level of gene transcription is much lower for DNA-2. Which
of the following three possibilities would best explain these observations?
A. DNA-1 has 4 negative supercoils and DNA-2 has 2 positive supercoils.
B. DNA-1 has 4 positive supercoils and DNA-2 has 2 negative supercoils.
C. DNA-1 has 2 positive supercoils and DNA-2 has 4 negative supercoils.
D. DNA-1 has 2 positive supercoils and DNA-2 has 2 negative supercoils. correct answers A.
DNA-1 has 4 negative supercoils and DNA-2 has 2 positive supercoils.
When two closely related species (like two salamanders) differ greatly in their total amount of
DNA, this is usually due to
A. the presence of many more genes in one of the species.
B. the presence of many more repetitive sequences in one of the species.
C. much longer introns in one of the species.
