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describe Molecular Biology

1. In a DNA molecule base pairing occurs between-

1) A denine as well as Thymine

2) A denine as well as Guanine

3) Guanine as well as Uracil

4) Thymine as well as Cytocine

2. The DNA classification GCCTAT in one strand has the opposite sequence of ------------ in the other strand.

1) GCCTAT

2) GCCATA

3) CGGAUA

4) CGGATA

3. In comparison of DNA to a warped ladder the upright (sides) of the ladder represent?

1) Nitrogenous bases paired together

2) Sugars linked to phosphates

3) Sugars linked to sulfates

4) Nitrogenous bases linked to phosphates

4. In Comparison of DNA to a twisted ladder and the rungs (steps) of the ladder represent?

1) Nitrogenous bases paired together

2) Sugars linked to phosphates

3) Sugars linked to sulfates

4) Nitrogenous bases linked to phosphates

5. Semi-conservative DNA replication means-

1) The old DNA is totally broken down

2) The old DNA remains completely intact

3) Each new DNA molecule has half of the old one.

4) A pairs with T and C pairs with G.

6. If Cytocine makes up 22% of the nucleotides in a illustration of DNA then Adenine would make up ------ % of the nucleotides.

1) 22%

2) 44%

3) 28%

4) 56%

7. Watson as well as Crick are credited with the discovery of:

1) DNA

2) The nucleus

3) RNA

4) The double helix

8. The sugar group in DNA is:

1) Dexyribose

2) Ribose

3) Glucose

4) Phosphate

9. Unwinds the double helix during replication:

1) DNA polymerase

2) DNA ligase

3) Helicase

4) RNA polymerase

10. Seals the nicks (gaps) in the rising discontinuous DNA strand during DNA replication

1) DNA polymerase

2) Ligase

3) Helicase

4) RNA polymerase

11. Corrects the added deoxynucleotide (base) in afresh formed strand during DNA replication-

1) DNA polymerase

2) Ligase

3) Helicase

4) RNA polymerase

12. The arrangement of bases on a strand of DNA may straight determine the sequence of:

1) Fatty acids in a fat molecule

2) Amino acids in a protein

3) Sugars in a polysaccharide molecule

4) All of these

13. Which of these are found in RNA however not DNA?

1) A denine

2) Uracil

3) Thymine

4) Phosphate

14. Both DNA as well as RNA-

1) Are single stranded molecules

2) Contain the same 4 nitrogenous bases

3) Have the same sugars

4) Contain phosphate

15. Takes place inside the nucleus-

1) Transcription

2) Protein synthesis

3) Replication of hereditary material

4) Both A and C

5) Translation

Biology, Academics

  • Category:- Biology
  • Reference No.:- M919202

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