Biology MCQ on DNA Structure for NEET and Medical Exam 2022
MCQ on DNA Structure: Biology is one of the most important and vital sections in NEET. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. Most of the concepts covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12. Other related sources make up for the rest of the syllabus.
In this post we are providing you MCQ on DNA Structure, which will be beneficial for you in upcoming NEET, AIIMS, JIPMER, PGIMER, CBSE Board, ICSE Board, Class 12th, 11th.
MCQ on DNA Structure
Q1. The process of DNA replication is affected by an enzyme known as _________. (c) Polymerase I
a) Mutase
b) Ligase
c) Polymerase I
d) Ribonuclease
Q2. In DNA, the enzyme which breaks the H2 bonds is _________. (b) Helicase
a) Ligase
b) Helicase
c) Topoisomerase
d) Polymerase
Q3. DNA fingerprinting recognizes the differences in _________. (d) both (a) and (c)
a) satellite DNA
b) bulk DNA
c) Repetitive DNA
d) both (a) and (c)
Q4. The type of coiling in DNA is _________. (d) Right-handed
a) Zig-zag
b) Left-handed
c) Opposite
d) Right-handed
Q5. The total DNA comprises what amount of cytoplasmic DNA in cells? (d) 1-5%
a) 95-99%
b) 65-75%
c) 45-50%
d) 1-5%
Q6. ______ force can stabilize a DNA double-helix . (a) Hydrophilic sugar-phosphate groups are found on the exterior of the helix where interaction with water occurs
a) Hydrophilic sugar-phosphate groups are found on the exterior of the helix where interaction with water occurs
b) Hydrophobic bases are present in the interior of the helix, each base-pair is stabilized by the same number of hydrogen bonds
c) covalent base stacking interactions may take place between neighbouring bases within the same strand in the helix
d) non-covalent N-glycosidic bonds may form between nitrogenous bases in opposite strands in the helix
Q7. The bases are held together in a DNA double helix by hydrogen bonds. These bonds are ______. (c) Non-covalent bonds
a) Ionic bonds
b) Covalent bonds
c) Non-covalent bonds
d) Van der Waals forces
Q8. A DNA molecule in which both strands have radioactive thymidine is permitted to replicate in an environment that contains non-radioactive thymidine. What is the right number of DNA molecules which possess some radioactive thymidine post three duplications? (b) two such molecules
a) one such molecule
b) two such molecules
c) four such molecules
d) eight such molecules
Q9. If the DNA strand has nitrogenous base sequence ATTGCC, the mRNA will have? (c) UAACGG
a) ATTGCA
b) UGGACC
c) UAACGG
d) ATCGCC
Q10. In which type of DNA replication, of the two newly formed molecules, one is purely a new one and the other is an old one ? (c) semiconservative
a) dispersive
b) conservative
c) semiconservative
d) both (b) and (c)
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By Team Learning Mantras