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Which is not a
| a. adenine | c. glutamine | e. cytosine |
| b. guanine | d. thymine | f. All are in DNA. |
Introduction:
DNA is a polymer of nucleotides. Each nucleotide consists of a deoxyribose sugar, three phosphate groups, and a nitrogen-containing base.
Answer to Problem 1SA
Correct answer:
Glutamine is not a nucleotide base in DNA. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as “glutamine.”
The four nitrogen bases of DNA are adenine, thymine, cytosine, and guanine. Glutamine is one of the
Reason for incorrect answer:
Option a. is given as, “adenine.”
Adenine is one of the two purine bases that form the nucleotides of DNA. Glutamine is classified under the category of amino acids. Hence, option a. is incorrect.
Option b. is given as, “guanine.”
Guanine is a nitrogenous base that belongs to the purine group. Glutamine is absent in the double-stranded DNA structure. Hence, option b. is incorrect.
Option d. is given as, “thymine.”
Thymine belongs to the pyrimidine group of nitrogen bases of DNA. Glutamine does not belong to the category of pyrimidines. Hence, option d. is incorrect.
Option e. is given as, “cytosine.”
Cytosine is a pyrimidine base in the nucleotides of DNA. Glutamine does not belong to the category of either purines or pyrimidines. Hence, option e. is incorrect.
Option f. is given as, “All are in DNA.”
Adenine, thymine, cytosine, and guanine are the four nitrogenous bases present in the double-helical structure of DNA. However, glutamine does not belong to the category of nitrogenous bases present in the DNA molecule. Hence, option f. is incorrect.
Hence, the options a., b., d., e., and f. are incorrect.
The four nitrogen bases of DNA are adenine, thymine, cytosine, and guanine. Glutamine is an amino acid and is absent in DNA bases. Thus, the correct answer is option c.
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Chapter 8 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
- 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_forwardWhich statement BEST DESCRIBES the genetic code? A. There can only be one codon for multiple amino acids. B. There are only 10 different amino acids in proteins. C. More than one codon for a specific amino acid. D. The genetic is misinterpreted to have U instead of T.arrow_forwardLevene made which contribution to our understanding of DNA structure? a. He determined that the nucleus contains DNA. b. He determined that DNA contains four nitrogenous bases c. He determined that DNA consists of nucleotides. d. He determined that the nitrogenous bases of DNA are present in regular ratiosarrow_forward
- I need help with a biology question: The rules for the pairing of nitrogen bases in DNA is Group of answer choices a. A = C and G = T b. A = C and G = T c. A = G and C = T d. A = T and G = Carrow_forwardWhich event contradicts the central dogma of molecular biology? a. Poly-A polymerase enzymes process mRNA in the nucleus. b. Endonuclease enzymes splice out and repair damaged DNA. c. Scientists use reverse transcriptase enzymes to make DNA from RNA. d. Codons specifying amino acids are degenerate and universal.arrow_forwardHow are nucleotides connected to each other in a single strand of DNA? A. The nitrogenous bases and acids link the separate nucleotides into a chain. B. The phosphate group of one nucleotide binds to the sugar on the next nucleotide. C. The hydroxy group of one nucleotide stabilizes the phosphate group of the adjacent nucleotide. D. The sugar of one nucleotide binds directly to the sugar of the adjacent nucleotide.arrow_forward
- What is meant by the term DNA replication? a. synthesis of nucleotides b. cell division c. interpretation of the genetic code d. the exact copying of the DNA code into two new moleculesarrow_forwardDNA _______________ adds an RNA primer that is complement to the template strand of DNAarrow_forwardThe _____ A. Nucleic acid B. Protein C. Carbohydrate D. Lipid DNA is made up of monomers called _____? A. Amino acids B. Nucleotides C. Monosaccharidesarrow_forward
- Which is true of the lagging strand in DNA synthesis? a. It is built elongating towards the replication fork b. It is composed entirely of RNA c. It is built in the 3’ to 5’ direction d. It elongates in a series of segments, rather than continuouslyarrow_forward_____________ is a mechanism that removes and replaces individual nucleotides in DNA when bases have been damaged.arrow_forwardWhich word explains how the bases pair with each other? A- complimentary B- opposite C- similararrow_forward
