21.

Assertion: Protons or hydrogen ions produced by photolysis of water accumulate in the lumen of thylakoids.

Reason: Photolysis of water takes place in inner membrane of thylakoid.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Plant growth as a whole is indefinite.

Reason: Plants retain the capacity of continuous growth throughout their life.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which of the following is a correct match

• Frog - External ears

• Earthworm - Muscular gizzard, typhlosole

• Human - Fat globule, 10 pairs of cranial nerves

• Cockroach - Chilopoda

Which of the following is an incorrect statement

• Blood group 'O' person have A and B antigens on RBCs.

• Eosinophils resist infections and are associated with allergic infection.

• RBC's contain carbonic anhydrase.

• T wave of normal ECG represent of depolarization of ventricle.

Which one of the following is correct regarding the excretion

• Large amount of water from renal filtrate is reabsorbed in DCT and a less amount is reabsorbed by PCT.

• The descending limb of loop of Henle is completely impermeable to salts.

• Malpighian corpuscle is found in medulla region of kidney.

• The colour of urine is pale yellow and is slightly alkaline in nature.

The opening between the right atrium and the right ventricle is guarded by the valve named

• bicuspid valve

• mitral valve

• tricuspid valve

• semilunar valve.

Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour

• Protien	Colour	Property
  Myosin	Light	Anisotropic

• Actin

  Dark

  Anisotropic

• Myosin

  Dark

  Isotropic

• Actin

  Light

  Isotropic

Assertion: In angiosperms, transport of food and water is more efficient than gymnosperms and pteridophytes.

Reason: In angiosperms longitudinally arranged sieve elements and vessels with perforated end walls are present.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Glycerides are important nutrients for body.

Reason: Glycerides are hydrolysed into glycerol and fatty acids which are further absorbed in intestine by the formation of chylomicron.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Blood in cockroach is colourless haemolymph with no respiratory pigment.

Reason: Respiration in cockroach occurs through diffusion in haemolymph.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.