MCQ
Identify the group which contains only pyrimidines.
- AAdenine, cytosine
- BUracil, cytosine
- CGuanine, uracil and cytosine
- DAdenine, guanine
Explanation:
DNA and RNA both have four bases, that includes two purines and two pyrimidines, in the nucleotide chains. There are two purines namely adenine and guanine and three pyrimidines namely cytosine, thymine and uracil. The purines adenine and guanine and the pyrimidine cytosine are common to both DNA and RNA. DNA has the pyrimidine thymine; RNA has the pyrimidine uracil.
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Reason : Low oxygen concentration is provided by leghaemoglobin.
$A.$ Maternal mortality rate $(MMR)$ $B.$ Infant mortality rate $(IMR)$
$C.$ Number of people in reproducible age $D.$ Death rate
| column $I$ | column $II$ |
| $A.$ $ICSI$ | $I$ Artificially introduction of semen into the vagina or uterus. |
| $B.$ $IUI$ | $II$ Transfer of ovum collected from a donor into the fallopian tube where fertilization occur |
| $C.$ $IUT$ | $III$ Formation of embryo by directly injecting sperm into the |
| $D.$ $GIFT$ | $IV$ Transfer of the zygote or early embryo (with upto $8$ blastomeres) into a fallopian tube. |
| $E.$ $ZIFT$ | $V$ Transfer of embryo with more than $8$ blastomeres into the uterus |
$R$- One pair of gene segregate independently of another pair.