Download App

10. Biomolecules — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry10. Biomolecules1 Mark
MCQ
In $DNA,$ the complimentary bases are
  • A
    adenine and guanine; thymine and cytosine
  • B
    uracil and adenine; cytosine and guanine
  • ✓
    adenine and thymine; guanine and cytosine
  • D
    adenine and thymine; guanine and uracil.
✓

Answer

Correct option: C.
adenine and thymine; guanine and cytosine
c
$DNA$ has a double helical structure. These helix contains polynucleotide chains and these chains are held together by hydrogen bonds. In this polynucleotide chain of $DNA$, addenine has thymine opposite to it and guanine has cytosine opposite to it.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 10. Biomolecules→10. Biomolecules — all question types→Chemistry STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Which of the following gases are poisonous
→
Apoenzyme is a:
→
Then during electrolysis of a solution of $AgNO_3$, $ 9650$  coulombs of charge pass through the electroplating bath, the mass of silver deposited in the cathode will be .............. $\mathrm{g}$
→
The most appropriate reagent to distinguish between acetaldehyde and formaldehyde is
→
Total number of tripeptides possible by mixing of valine and proline is $............$.
→
What will be major product, when $2-$ methyl butane undergoes bromination in presence of light ?
→
Which of the following is the odd one out
→
The correct structure of ethylenediaminetetraacetic acid $(EDTA)$ is
→
A reaction that is of the first order with respect to reactant $A$ has a rate constant $6\,{\min ^{ - 1}}.$ If we start with $[A] = 0.5\,mol\,\,{l^{ - 1}}$, when would $[A]$ reach the value $ 0.05\,mol$ ${l^{ - 1}}$ ...... $\min$
→
In osmosis
→