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MCQs ON MOLECULAR BASIS OF INHERITANCE FOR NEET
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1. One of Chargaff’s rules states that …………..
a. A + T = G + C.
b. A + G = T + C.
c. A = G, T = C.
d. A = C, T = G.
2. If a species contains 23% adenine A in its DNA, what is the percentage of guanine G would it also contain?
A. 23%
b. 46%
c. 25%
d. 27%
3. The amount of adenine is always equal to the amount of _____ in DNA.
A. Cytosine
b. Uralic guanine
c. Thymine
d. ATP
4. A eukaryotic chromosome is made up of:
a. DNA only
b. Histones and nucleic acid
c. Centromeres and centrioles
d. Loops of naked DNA
5. Which of the following statements about DNA replication is NOT correct?
a. Unwinding of the DNA molecule occurs as hydrogen bond break.
b. Replication occurs as each base is paired with another exactly like it.
c. The process is known as semi conservative DNA replication because one old strand is conserved in the new DNA molecule.
d. Complementary base pairs are held together with hydrogen bonds.
6. Replication of DNA is …………..
a. Semi conservative.
b. required the unwinding of the double helix.
c. involves new complementary nucleotides forming base pairs and then joining to form new strands.
d. All of the choices are correct.
7. Which of the classes of RNA molecules carries the genetic information as it is needed for the construction of a protein?
a. ribosomal RNA, rRNA
b. transfer RNA, tRNA
c. messenger RNA, mRNA
d. primary mRNA transcript
8. Which of the classes of RNA molecules carries the amino acids that are added to the growing polypeptide chain?
a. ribosomal RNA
b. transfer RNA
c. messenger RNA
d. primary mRNA transcript
9. Which of the classes of RNA molecules is linked with proteins in forming the large and small subunits of protein synthesis structure?
a. ribosomal RNA
b. transfer RNA
c. messenger RNA
d. primary mRNA transcript
10. Hereditary information is indicated by ……………
a) Sequence of nucleotides
b) Position of nucleic acid
c) Number of nucleic acid
d) All of these
ANSWERS:
[1] b
[2] d
[3] c
[4] b
[5] b
[6] d
[7] c
[8] b
[9] a
[10] a
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