How many different types of gametes are produced, if the genotype of a plant is AABB?

• 8

• 6

• 4

• 2

• 2

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

Match the following

• 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

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

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

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

Choose the correct correctly matched pair

• CAD - Atherosclerosis

• Tetany - Disorder of the neuromuscular junction

• Gout - Rapid spasms in muscles

• Goitre - Hyperthyroidism

• Goitre - Hyperthyroidism

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

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