Bio chem Module 6 questions and answers A+ Grade

Bio chem Module 6 questions and answers
2026\2027 A+ Grade



In DNA, adenine always pairs with .



- Thymine

- Guanine

- Uracil

- Cytosine
- correct answer - Thymine



DNA is built from which of the following?



- Nucleosides

- Genes

- Purines

- Nucleotide

- Codons
- correct answer - Nucleotide



The double helix of DNA is stabilized mainly by .



- Ionic bonds

- Covalent bonds

- Ion-dipole bonds

- Hydrogen bonds

, - Hydrogen covalent bonds
- correct answer - Hydrogen bonds



Which of the following pentose sugars is a constituent of DNA?



- Xylose

- Ribitol

- 2-deoxyribose

- Arabinose

- Ribose
- correct answer - 2-deoxyribose



Pyrimidines have ring(s), (each) containing nitrogen(s), whereas purines have
ring(s), (each) containing nitrogen(s).



- 1; 1; 1; 1

- 1; 2; 2; 2

- 2; 2; 1; 2

- 2; 1; 1; 2

- 2; 2; 1; 1
- correct answer - 1; 2; 2; 2



Identify the base guanine from among the following structures.
- correct answer 5 NH in rings with a double bonded O



Which of the following nucleic acids is responsible for using the encoded genetic information to produce
of proteins found in living organisms?



- Peptide nucleic acid

- Ribonucleic acid

- Ribitol nucleic acid