Download App

Human Reproduction — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction1 Mark
MCQ
Menstrual cycle is generally of $..........$
  • A
    $21$ days
  • ✓
    $28$ days
  • C
    $38$ days
  • D
    $40$ days
✓

Answer

Correct option: B.
$28$ days

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 Human Reproduction→Human Reproduction — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Assertion : Replication and transcription occur in the nucleus but translation in the cytoplasm.

Reason : $m-RNA$ is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.

→
Random genetic drift in a population probably results from:
→
Azolla is used as a biofertilizer, because it:
→
$A$ : Operator gene is functional when it is not blocked by repressor.
$R$ : Regulator gene produces active protein only which acts on operon system in $E$.coli
→
$A$ : Peptidyl transfer site is contributed by larger sub-unit of ribosome.
$R$ : The enzyme peptidyl transferase is contributed by both $23S$ and $16S$ ribosomal sub-units.
→
Who postulated the 'Chromosome Theory of Inheritance'
→
The development of root and shoot in tissue culture is determined by $........$
→
A child of a mother with blood group $A$ and a father with blood group $AB$ may have any one of the following blood groups except
→
Who discovered $DNA$ fingerprinting
→
Colour blindness is caused by a single
→