If the four bases of DNA have to code for twenty amino acids, the code should constitute a combination of bases. This was proposed by
Rosalind
Har Gobind Khorana
George Gamow
Marshall Nirenberg
Marshall Nirenberg
C.
George Gamow
Gamow's suggested that the twenty combinations of four DNA bases taken three at a time corresponded to the twenty amino acid that form proteins.This led rick and Watson to enumerate the twenty amino acid common to proteins. Gamow's ontributions to solving the problem of genetic coding gave rise to important model of biological degeneracy.
Match the following
| List I | List II |
| A. Contraceptive pill | 1. Prevents sperms reaching the female reproductive tract |
| B. Condom | 2. Inhibits ovulation and implantation |
| C. Vasectomy | 3. Increases phagocytosis of sperms |
| D. Copper I | 4. Blocks gamete transport |
A - 4; B - 1; C - 2; D - 3
A - 1; B - 2; C - 3; D - 4
A - 2; B - 1; C - 3; D - 4
A - 4; B - 3; C - 1; D - 2
A - 4; B - 3; C - 1; D - 2
X and y are disenses in infants. X is produced by deficiency of proteins and calories. Y is produced by protein deficiency unaccompanied by calories deficiency. X and Y are respectively
Kwashiokar; Marasmus
Diabetes; Goitre
Goitre; Diabetes
Marasmus; Kwashiorkar
Marasmus; Kwashiorkar
The natural antibodies in the plasma of a person with blood group 'O' is
Anti- A only
anti - B only
Anti-A and Anti-B only
Anti-B and Anti-D only
Anti-B and Anti-D only
Which among these are correctly matched
(i) Down's syndrome - trisomy 21
(ii) Klinefelter's syndrome - 45, XO
(iii) Turner's syndrome - 47x XXY
(ii) and (iii) only
(i) only
(i) and (ii) only
(iii) only
(iii) only
Which one of the following does not follow the central dogma in molecular biology?
HIV
E.coli
Mucor
Chlamydomonas
Chlamydomonas
The scientists(s) who performed experiments with heavy isotopes of nitrogen to prove that DNA replicates semiconservatively is/are
Fredrick Griffith
Watson and Crick
Taylor
Meselson and Stahl
Meselson and Stahl
Choose the correct correctly matched pair
CAD - Atherosclerosis
Tetany - Disorder of the neuromuscular junction
Gout - Rapid spasms in muscles
Goitre - Hyperthyroidism
Goitre - Hyperthyroidism
In Eukaryotes, the removal of RNA polymerase III from the nucleoplasm will affect the transcription of
mRNA
hnRNA
tRNA
5.8S rRNA
5.8S rRNA
