MCQ
Gene mutations are those which involve:
- AThe change in nature and sequence of base triplets of DNA
- BThe change in genome
- CThe change in all the genes
- DThe disappearance of certain part of chromosome
Explanation:
Gene's transcription and translation produces a protein which has a specific function to perform. Also, a protein is a chain of amino acids. These amino acids are coded by codons or base triplets. Each codon will code for a particular amino acid. Change in sequence of these base triplets/ codons (due to mutation) will lead to code of different amino acid and ultimately it will lead to a different protein which may be functional or non-functional.
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Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.
$I$. There are many side effects of tubectomy and vasectomy
$II$. Purpose of tubectomy is to prevent egg formation
$III$. The most important component of the oral contraceptive pill is progesterone
$IV$. Contraceptive oral pills help in birth control by preventing ovulation
| Column $- I$ | Column $- II$ |
| $(1)$ Bacterial membrane | $(p)$ Chitinase |
| $(2)$ Plant cells | $(q)$ Ribonuclease |
| $(3)$ Fangus membrane | $(r)$ Lysozyme |
| $(4)\; RNA$ molecule | $(s)$ Cellulase |
$(i)$ The heterozygous female transmit the disease to son.
$(ii)$ Change in the shape of the $RBC$ from biconcave disc to elongated sickle like structure.
$(iii)$ Mentally retarded.
$(iv)$ Heamoglobin not formed proper amount in blood.