Who proved that oxygen evolved in photosynthesis comes from water?

• Mayer

• Calvin

• Ruben, Hassid and Kamen

• Blackman

Which of the following set is a mis-match?

• Phosphoenol pyruvate carboxykinase - Gluconeogenesis

• Phospho fructokinase - Glycolysis

• Succinate dehydrogenase - Kerbs cycle

• Urease - Urea cycle

Which one of the following animals lay eggs yet the female secretes milk?

• Bat

• Kangaroo

• Platypus

• Ostrich

Pernicious anaemia is caused due to

• absence of vitamin-K

• lack of Vitamin - B₁₂

• lack of Vitamin - C

• presence of intrinsic factor

Taxonomically, which of the following set is matched correctly?

• Cattle fish, jelly fish, silver fish

• Bat, pigeon, kite

• Lobsters, spider, shrimps

• Oyster, otter, Octopus

How many molecules of oxygen can bind to a molecule of haemoglobin?

• One

• Two

• Three

• Four

Which of the following type of cartilage is found in intervertebral disc of mammal?

• Hyaline cartilage

• Fibrous cartilage

• Calcified cartilage

• Elastic cartilage

2NAD(H⁺) produced during anaerobic glycolysis yield

• 6 ATP molecules

• 4 ATP molecules

• 8 ATP molecules

• None of these

The centrum of eighth vertebra of frog is

• procoelous

• heterocoelous

• amphicoelous

• opisthocoelous

In human eyes, colour perception is done by

• rod cells only

• cone cells only

• Both (a) and (b)

• choroid laver cells