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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.
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Chapter 8 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
- 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_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_forwardWhich amino acid sidechain can readily donate or accept a proton at near physiological pH? a. Proline b. Lysine c.Tyrosine d.Histidinearrow_forward
- 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.arrow_forwardWhat is the genetic information in DNA due to? A. composition of DNA in a gene B. specificity of base pairing C. sequence of nucleotides D. sugar-phosphate backbone E. precise three-dimensional conformation of DNAarrow_forwardIf 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 determinedarrow_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_forwardWhat genetic material in a living cell which is single stranded involved in the coding of genes for protein synthesis? * 1 point a. DNA b. RNA C. mRNA d. tRNAarrow_forwardWhich of the following correctly describes a structural feature of DNA or RNA? a. RNA may fold into complex three-dimensional structures necessary for its activity b. RNA & DNA are both usually double stranded c. DNA tends to fold into complex three-dimensional structures required for its activity d. DNA contains a pentose sugar with a hydroxyl group in the 2' positionarrow_forward
