Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 3, Problem 10TY
Summary Introduction
Introduction: Four types of bases are present in DNA (Deoxyribose
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Which of the following statements about DNA is true? (Select all that applied)
Select one:
a. DNA contains thymine but not uracil.
b. DNA molecules contain deoxyribose.
c. All of these
d. In a double-stranded DNA molecule, adenine on one strand will be connected to thymine on the
complementary strand by two hydrogen bonds.
If one of the strands in DNA is made up of 10%
guanine, what will be the composition of the DNA?
A. 10% C
B. 40% U
C. 10% C in its complementary strand
D. 40% A + T
O E. cannot be determined
Which of the following statements about nucleic acids is not correct?
Select one:
A.
In DNA the distance between the strands of the double helix is relatively constant.
B.
The growing DNA polymer is synthesized in the 5' to 3' direction.
C.
The enzymes that catalyze DNA synthesis are known as DNA polymerases.
D.
RNA strands are synthesized in the 3' to 5' direction.
E.
Unlike DNA, RNA is easily cleaved because the 2'-OH group of the ribose is a nucleophile that catalyzes hydrolysis of the strand.
Chapter 3 Solutions
Biology
Ch. 3.4 - Prob. 1CCCh. 3.4 - What type of reaction is the reverse of the one...Ch. 3.4 - Prob. 1CSCh. 3.5 - Prob. 1CCCh. 3.5 - Prob. 1CSCh. 3.6 - How many water molecules would be produced during...Ch. 3.6 - Prob. 2CCCh. 3.6 - Prob. 1EQCh. 3.6 - Prob. 2EQCh. 3.6 - CoreSKILL Explain the result that was crucial to...
Ch. 3.7 - Prob. 1CCCh. 3 - Molecules that are found in living cells and...Ch. 3 - The versatility of carbon that allows it to serve...Ch. 3 - Prob. 3TYCh. 3 - Prob. 4TYCh. 3 - Prob. 5TYCh. 3 - In contrast to other fatty acids, essential fatty...Ch. 3 - Prob. 7TYCh. 3 - The monomers of proteins are ___________, and...Ch. 3 - Prob. 9TYCh. 3 - Prob. 10TYCh. 3 - Explain the similarities and differences between...Ch. 3 - Prob. 2CQCh. 3 - Prob. 3CQCh. 3 - Discuss the differences between the various types...Ch. 3 - Prob. 2COQ
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- A nucleotide is composed of all of the following excepta. 5-carbon sugar. c. 6-carbon sugar.b. nitrogen base. d. phosphate grouparrow_forwardWhat type of interaction between the base pairs serves as the "glue" to keep the two DNA strands together? O A. hydrogen bonding B. covalent bonding O C. ion-dipole interactions D. ionic bonding O E. London dispersion forcesarrow_forwardThe antiparallel nature of DNA refers to a. its charged phosphate groups. b. the pairing of bases on one strand with bases on the other strand. c. the formation of hydrogen bonds between bases from opposite strands. d. the opposite direction of the two strands of nucleotides.arrow_forward
- Which of the following is the correct way that heterocyclic bases are paired between two polypeptide chains of DNA? a. Pyrimidines-Pyrimidines b. Purine-Pyrimidine c. Purines-Purine d. Sugar-Phosphatearrow_forwardThe type of bonds between the nucleotide bases of the two strands of DNA are a.polar covalent bonds. b.nonpolar covalent bonds. c.hydrogen bonds. d.ionic bonds.arrow_forwardWhich of the following statement for the B-DNA helix is NOT true? a. It is a left-handed helix. b. Planes of bases are nearly perpendicular to the helix axis. c. Sugars are in the 2’-endo conformation. d. Bases are in the anti conformation. e. It is a common form of duplex DNA solution.arrow_forward
- DNA is less susceptible than RNA to alkaline hydrolysis. Which of the following is the most appropriate explanation? A. DNA is double-strand while RNA is single-stranded. B. DNA has a 2' hydrogen while RNA has a 2' hydroxyl group. C. DNA has tertiary structure while RNA does not have. D. DNA includes thymine bases while RNA includes uracil bases. E. DNA is in nucleus while RNA is not.arrow_forwardWhich of the following is the monomeric unit of DNA. A. Nucleotides B. Deoxyribose C. Nitrogenous bases D. Phospatearrow_forwardThe base content of a particular DNA molecule is 36% thymine. What is the percentage of each of the following bases in the molecule? a. Adenine b. Guanine c. Cytosinearrow_forward
- Which of the following relations or ratios would be true for a doublestranded DNA molecule? a. A + T = G + C b. A + T = T + C c. A + C = G + T d. A + TC + G = 1.0 e. A + GC + T = 1.0 f. AC = GT g. AG = CT h. AT = GCarrow_forwardWhich of the following relations or ratios would be true for a doublestranded DNA molecule? a. A + T = G + C b. A + T = T + C c. A + C = G + T d. A + TC + G = 1.0 e. A + GC + T = 1.0 f. AC = GT g. AG = CT h. AT = GCarrow_forwardA new type of nucleic acid molecule is found have a base composition of 29% adenine, 19% thymine, 21% cytosine and 31% guanine. The molecule is probably: a. single stranded DNA b. double stranded RNA c. double stranded DNA d. single stranded RNAarrow_forward
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