Download App

Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
Mutations are usually induced by:
  • A
    Gamma rays
  • B
    Alpha rays
  • C
    Beta rays
  • D
    Visible light
✓

Answer

  1. Gamma rays

Explanation:

Mutations are usually induced by gamma rays. If a gamma ray hits a DNA strand, then it breaks the double strands of DNA. Normally, DNA can repair most radiation damage, but If there is a lot of damage, then the cell will not be able to divide properly and will die. Alpha, beta, and visible light can not induce mutations.

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 (0.5 Marks)" from Principles of Inheritance and Variation→Principles of Inheritance and Variation — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Glucose fermentation by yeast yields:
→
Select the statement which explains best parasitism.
→
Major site of decomposition in the soil and water bodies respectively is
→
The equivalent of a structural gene is
→
$A$ pair of bulbourethral gland also called $...A...$ gland present on the either side of $...B.... $ It secrets $...C...$ fluid and $...D...$ for lubricating the penis. Here $A, B, C$ and $D$ are
→
Consider the following four statements $(1-­4)$ about certain desert animals such as kangaroo rat.

$(1)$ They have dark colour and high rate of reproduction and excrete solid urine.

$(2)$ They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.

$(3)$ They feed on dry seeds and do not require drinking water.

$(4)$ They excrete very concentrated urine and do not use water to regulate body temperature.

Which two of the above statements for such animals are true ?

→
...$A$... released by $LAB$ during growth coagulate and partially digest ...$B$.... Here $A$ and $B$ refers to
→
Allergy is due to the release of chemicals like.....and........ from the ...... cells
→
Penicillium produces :
→
Infertility in males can be caused due to:
→