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 |
D.
| Actin | Light | Isotropic |
Each actin (thin) filament is a polymerised protein made up of two 'F' (fibrous) actin strands helically wound to each other. Each 'F' actin is a polymer of monomeric 'G' (globular) actins. It is light in colour & shows isotropic property.
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
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.
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: 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.
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.
The opening between the right atrium and the right ventricle is guarded by the valve named
bicuspid valve
mitral valve
tricuspid valve
semilunar valve.
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.
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.
