Concept explainers
Videos
Which is not a
a. adenine
b. guanine
c. glutamine
d. thymine
e. cytosine
f. All are in DNA.
Concept introduction: Nucleotides are building blocks of DNA and RNA. DNA has four nucleotides, namely adenine and guanine (which are purines), and thymine and cytosine (which are pyrimidines).
Answer to Problem 1SQ
Correct answer: Glutamine is not a nucleotide base in the DNA. Therefore, option c. is correct.
Explanation of Solution
Reasons for the correct statement:
Glutamine is a basic amino acid. DNA is made of purines and pyrimidines that are collectively called as nucleotides. Glutamine is neither a purine nor a pyrimidine.
Option c. is given as “glutamine”
As glutamine is an amino acid and not a nucleotide base, option c. is correct.
Reasons for the incorrect statements:
Option a. is given as “adenine”.
Adenine is a purine and a nucleotide base in DNA. Therefore, option a. is incorrect.
Option b. is given as “guanine”.
Guanine is a purine and is a nucleotide base in DNA. Therefore, option b. is incorrect.
Option d. is given as “thymine”.
Thymine is a pyrimidine and is a nucleotide base in DNA. Therefore, option d. is incorrect.
Option e. is given as “cytosine”.
Cytosine is a pyrimidine and is a nucleotide base in DNA. Therefore, option e. is incorrect.
Option f. is given as “All are in DNA”.
Adenine, guanine, cytosine, and thymine are present in DNA, and glutamine is absent in DNA. Therefore, option f. is incorrect.
Hence, options a., b., d., e., and f. are incorrect.
Want to see more full solutions like this?
Chapter 8 Solutions
Bundle: Biology: The Unity and Diversity of Life, Loose-leaf Version, 14th + LMS Integrated for MindTap Biology, 2 terms (12 months) Printed Access Card
- Which of the following are pyrimidines? Select one: A. adenine and thymine B. cytosine and thymine C. adenine and guanine D. adenine and cytosine E. guanine and thyminearrow_forwardWhat provides the negative charge associated with DNA? a. sulfhydryl groups b. nitrogenous bases c. phosphate groups d. deoxyribose's hydroxyl groups e. ribose's hydroxyl groupsarrow_forwardWhich of the following is not a nucleotide? a. adenosine triphosphate b. adenosine diphosphate c. adenine d. cytosine e. arabinosearrow_forward
- 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 correctarrow_forwardDraw the two dipeptides formed from each pair of amino acids. a. tyrosine and lysine b. threonine and glutamine c. alanine and histidinearrow_forwardWhich 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.arrow_forward
- Which amino acid sidechain can readily donate or accept a proton at near physiological pH? a. Proline b. Lysine c.Tyrosine d.Histidinearrow_forwardThe amino acid that does not contain a cyclic ring. a. proline b. threonine c. tyrosinearrow_forwardWhich of the following nitrogenous bases is found in RNA but not in DNA? A. Thymine B. Cytosine C. Uracil D. Adeninearrow_forward
- What types of bonds form between 5' and 3' carbons on the same strand of DNA/RNA? which answer choice? a. Hydrogen bond b. Phosphodiester bond c. Peptide bond d. Ionic bondarrow_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 is NOT found in RNA? A. thymine B. adenine C. uracil D. cytosine E. guaninearrow_forward
