What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 3, Problem 10MC
Summary Introduction
Introduction:
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In a DNA molecule,
Select one:
A. The nucleotides are hydrogen-bonded to one another
B. The bases are covalently bonded to one another.
C. The bases are hydrogen-bonded to the sugars.
D. The nucleotides are covalently bonded to one another.
Which statement about DNA bases is true?
A. Adenine and guanine are purines.
B. Thymine and adenine are pyrimidines.
C. Guanine and cytosine are pyrimidines.
D. Guanine and cytosine are purines.
E. None are correct
The 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.
Chapter 3 Solutions
What Is Life? A Guide to Biology with Physiology
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- The 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_forwardAccording to Chargaff’s rules for DNA base composition, if a DNA sample contained 10% guanine, the sample should have: A. 40% cytosine B. 90% cytosine C. 10% adenine D. 40% thyminearrow_forwardWhich of the following characteristics does not describe DNA? a contains thymine b contains uracil c contains cytosine d stays in the nucleusarrow_forward
- The backbone of DNA molecule is made of? a. nucleotides b. alternating phosphates and bases c. alternating bases and sugars d. alternating sugar and phosphate moleculesarrow_forwardIf the DNA of an organism contains 20% adenine, what is its percentage of guanine? a.20% b.60% c.80% d.30%arrow_forwardWhich of the following is false regarding a DNA molecule? a-It contains a double helix structure b-It stores genetic information c-It contains the nitrogen base Uracil d-It contains base pairsarrow_forward
- Which of the following are nucleotide base pairs found in DNA? Select all that apply. A. Adenine and thymine B. Cytosine and adenine C. Thymine and guanine D. Guanine and cytosinearrow_forwardThe DNA of different species differs in the (a) sequence of bases. (b) complementary base-pairing. (c) number of nucleotide strands. (d) location of the sugar-phosphate portion of the DNA molecule.arrow_forwardWhich of the following is NOT a dissimilarity between RNA and DNA? a) Types of bases b) Double-stranded vs. single-stranded c) Type of sugar d) Formation of Phosphodiester bondsarrow_forward
- Cystic Fibrosis is caused by which of the following? a. Replacement of three nucleotides with a new three nucleotide sequence b. Addition of three nucleotides c. Deletion of three nucleotidesarrow_forwardA DNA molecule consists of 500 nitrogenous bases, of which 150 are G bases. So, the percentage of nitrogenous base T is equal to? choose the correct answer A)20% B)30% C)40% D)60%arrow_forwardWhich of the following is the monomeric unit of DNA. A. Nucleotides B. Deoxyribose C. Nitrogenous bases D. Phospatearrow_forward
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