Which one of the following elements is an activator for both ribulose biphosphate, carboxylase oxygenase and phosphoenol-pyruvate carboxylase in photosynthetic carbon fixation?

•  Mg²⁺

• Zn²⁺

•  Mn²⁺

• Cl⁻ and K⁺

The powerhouse of cells is first discovered by

•  C Benda in 1897

•  Kolliker in 1850

• Claude in 1880

• Kingsburg in 1882

During chloride shift or Hamburger phenomenon, when the whole blood is saturated with CO₂, following changes occurs. Which one of them is not correct?

• Bicarbonate content of plasma and corpuscles increase

• Chloride content of plasma diminished and that of the cell is increased

• Total base of blood remain unchanged

• Water content and volume of corpuscles decrease

Adenosine triphosphate was discovered by

• Jack Lipman

• A Bloor

• Karl Lohmann

• Emil Fisher

Consider the following statements and Choose correct ones from given options.

(I) Shark do not have any bone in its body.

(II) Water snake and salamander belongs to same class and have largest RBC.

(III) Silver fish is a true fish while cuttle and star fishes are mollusks and echinoderms respectively.

(IV) Ornithorhynchus is a connecting link between reptiles and mammals.

• I, II and IV

• I and IV

• I, II and III

•  III and IV

Lens of eyes is derived from

• Ectoderm

• Mesoderm

• Endoderm

• Both (b) and (c)

Common phase in aerobic and anaerobic respiration is

• Kreb’s cycle

• Glycolysis

• Glycogenolysis

• ETS

The largest muscle in the human is

• Biceps

• Gluteus maximus

• Stapedius

• Masseter

Which one of the following pair is not correctly matched?

• Almond-Drupe

• Brinjal-Berry

• Guava-Pepo

• Loquat-Pome

Schneiderian and tympanic membrane respectively belongs to

• Ear and nose

• Ear and eye

• Ear and ear

• Nose and ear