Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

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+


A.

 Mg2+

In photosynthetic carbon fixation magnesium ion (Mg) is an activator for both ribulose bisphosphate carboxylase oxygenase and phosphoenol-pyruvate carboxylase enzymes.


2.

Which one of the following pair is not correctly matched?

  • Almond-Drupe

  • Brinjal-Berry

  • Guava-Pepo

  • Loquat-Pome


C.

Guava-Pepo

Guava (Psidium guajava) fruit is a pseudoscopic berry. in which pericarp and placenta are edible.


3.

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


B.

I and IV

• Shark is a member of Chondrichthyes class, which is a cartilaginous fish.
• Water-snake is a reptile and salamander is an amphibian having largest RBC in the Animal Kingdom.
• Silverfish (Lepisma) is an arthropod, cuttlefish (Sepia) is a mollusc and starfish(Asterias) is an Echinodermata. So none of them is a true fish (Pisces).

• Omnithorhychus is a mammal which is also known as duck-billed platypus. It is a member of Monotremata order which is a connecting link between reptiles and mammals.


4.

Adenosine triphosphate was discovered by

  • Jack Lipman

  • A Bloor

  • Karl Lohmann

  • Emil Fisher


C.

Karl Lohmann

Adenosine Triphosphate (ATP) was discovered by Karl Lohmann in 1929 from muscles.


5.

Schneiderian and tympanic membrane respectively belongs to

  • Ear and nose

  • Ear and eye

  • Ear and ear

  • Nose and ear


D.

Nose and ear

Schneiderian and tympanic membranes respectively belongs to nose and ear.


6.

The powerhouse of cells is first discovered by

  •  C Benda in 1897

  •  Kolliker in 1850

  • Claude in 1880

  • Kingsburg in 1882


B.

 Kolliker in 1850

Mitochondria which is also known as the power house of the cell was first discovered by Kolliker in 1850. It is the site of cellular respiration.


7.

The largest muscle in the human is

  • Biceps

  • Gluteus maximus

  • Stapedius

  • Masseter


B.

Gluteus maximus

In human body masseter muscle is the strongest muscle, gluteus maximus is the largest and stapedius is the smallest muscle.


8.

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


D.

Water content and volume of corpuscles decrease

According to Hamburger phenomenon, when the whole blood is saturated with carbon dioxide, the following changes are seen

(i) The bicarbonate contents of plasma and corpuscles increase.
(ii) The chloride content of plasma lo diminished and that of the cell is increased.
(iii) The total base (cations) of both plasma and corpuscles remain unchanged.
(iv) The water content and the volume of corpuscles increase.
(V) When the carbon dioxide is removed from the blood reverse changes takes place.
(vi) When CO2, enters the blood, Cl- from plasma enters RBCs leaving Na+ behind. When CO2 escapes from blood Cl- leaves the cell and combines with Na+ again. Due to this alternate movement of Cl ions, this phenomenon is called chloride shift.


9.

Common phase in aerobic and anaerobic respiration is

  • Kreb’s cycle

  • Glycolysis

  • Glycogenolysis

  • ETS


B.

Glycolysis

Glycolysis is a common phase for aerobic and anaerobic respiration where 1 molecule of glucose (6 C)break down into 2 molecules of pyruvic acid (3 C).


10.

Lens of eyes is derived from

  • Ectoderm

  • Mesoderm

  • Endoderm

  • Both (b) and (c)


A.

Ectoderm

Eye lens is derived from ectoderm.