How many molecules of oxygen can bind to a molecule of haemoglobin?
One
Two
Three
Four
D.
Four
Each haemoglobin molecule has four iron atoms, each of which can combine with a molecule of oxygen through coordinate bond O=O. Hence, total four molecules of oxygen can bind (or combine) with one molecule of haemoglobin.
Pernicious anaemia is caused due to
absence of vitamin-K
lack of Vitamin - B12
lack of Vitamin - C
presence of intrinsic factor
In human eyes, colour perception is done by
rod cells only
cone cells only
Both (a) and (b)
choroid laver cells
Which of the following type of cartilage is found in intervertebral disc of mammal?
Hyaline cartilage
Fibrous cartilage
Calcified cartilage
Elastic cartilage
Which of the following set is a mis-match?
Phosphoenol pyruvate carboxykinase - Gluconeogenesis
Phospho fructokinase - Glycolysis
Succinate dehydrogenase - Kerbs cycle
Urease - Urea cycle
Taxonomically, which of the following set is matched correctly?
Cattle fish, jelly fish, silver fish
Bat, pigeon, kite
Lobsters, spider, shrimps
Oyster, otter, Octopus
Who proved that oxygen evolved in photosynthesis comes from water?
Mayer
Calvin
Ruben, Hassid and Kamen
Blackman
2NAD(H+) produced during anaerobic glycolysis yield
6 ATP molecules
4 ATP molecules
8 ATP molecules
None of these
Which one of the following animals lay eggs yet the female secretes milk?
Bat
Kangaroo
Platypus
Ostrich
