Which of the following pair is characterised by swollen lips, thick pigmented skin of hands and legs and irritability ?
Iodine - Goitre
Protein - Kwashiorkor
Thiamine - Beri-beri
The molecular structure of insulin was first described by :
Phytochrome occurs in two forms. In which form it promotes the germination of seeds of some species ?
None of these
Insect resistance transgenic cotton has been produced by inserting a piece of DNA from:
a wild relative of cotton
Mutations which alter nucleotide sequence within a gene are :
frame shift mutations
base pair substitutions
both 'a' and 'b'
none of these
Which organism was used by Beadle and Tatum to proposed one gene-one enzyme hypothesis ?
When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the F1 generation consists of tall plants with rounded seeds. How many types of gametes an F1 plant would produce ?
Parent generation - Tall round seeds Dwarf wrinkled seeds
TTRR x ttrr
Gametes - TR tr
F1 generation - TtRr
Therefore, only one type of gametes is produced in F1 plants, i.e. TtRr or Tall round seeds.
Diadelphous stamens are the characteristic features of :
Human immuno deficiency virus causes
Acquired immuno deficiency syndrome