Download App

STD 12 - 5. molecular basis of inheritance — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 5. molecular basis of inheritance1 Mark
MCQ
$DNA$ is double helix and
  • A
    Complementary and parallel
  • ✓
    Complementary and antiparallel
  • C
    Without super coils
  • D
    Always circular
✓

Answer

Correct option: B.
Complementary and antiparallel
b
(b) The two strands $(polynucleotide chains)$ of Double helix are antiparallel complementary.

The sequence of nitrogenous bases in one determines the sequence of nitrogenous bases in the other.

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 STD 12 - 5. molecular basis of inheritance→STD 12 - 5. molecular basis of inheritance — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

An antibiotic resistance gene in a vector usually helps in the selection of:
→
Common symptoms of allergy are
→
Match the following.
Column $- I$ Column $- II$
$(A)$ Lamark $(p)$ Finch bird
$(B)$ De Vries $(q)$ Evening primerose
$(C)$ Darwin $(r)$ Giraffes
$(s)$ Melanic moths
→
The$...A...$ are the $DNA$ molecules that can carry a foreign $...B...$ segment into the host cell.

Here $A$ and $B$ refers to

→
Which of the following is a secondary pollutant?
→
What was used to obtain streptomycin resistant isolates in Lederberg's replica plating experiments?
→
All genes located on the same chromosome:
→
One layer of sediment on Sedim layer witness to the Earth's long history, it indicates:
→
In the lac operon, the structural genes are switched off when
→
If a normal woman marries a colourblind man, their
→