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Cell is the fundamental structural and functional unit of all living organisms because:
(1) Anything less than a complete structure of a cell does not ensure independent living.
(2) The metabolic reactions can only occur inside a living cell.
(3) Nucleic acids present in the cells ensure living state.
(4) The membrane bound organelles cause differentiation for proper functioning.

Mesosomes in prokaryotes do not help in:
(1) Cell wall formation
(2) DNA replication
(3) Respiration
(4) Photosynthesis

The cis and trans faces of the Golgi Apparatus are:
(1) Similar but not interconnected
(2) Similar and interconnected
(3) Entirely different but interconnected
(4) Entirely different and not interconnected

Plastids used in storing proteins are called as:
(1) Amyloplasts
(2) Aleuroplasts
(3) Elaioplasts
(4) Chromoplasts

A centriole-like structure, from which the cilium and the flagellum emerge, is the:
(1) Centrosome
(2) Basal body
(3) Axoneme
(4) Vimentin

The outer membrane of the nucleus:
I. is continuous with the Endoplasmic reticulum
II. does not bear ribosomes.
(1) Only I is correct
(2) Only II is correct
(3) Both I and II are correct
(4) Both I and II are incorrect

If the centromere is situated close to the end of a chromosome, it is called as:
(1) Metacentric
(2) Submetacentric
(3) Acrocentric
(4) Telocentric

The centrioles replicate during:
(1) G₁ phase
(2) S phase
(3) G₂ phase
(4) Early prophase

Bivalent chromosomes clearly appear as tetrads during:
(1) Zygotene
(2) Pachytene
(3) Diplotene
(4) Diakinesiss

Gelatin is often used as an ingredient in manufacture of ice-cream. The reason for this is:
(1) to prevent the formation of colloid
(2) to stabilise the colloid and prevent crystal growth
(3) to cause the mixture of solidify
(4) to improve the flavour

Cloud burst due to:
(1) attraction towards the electrical charges on earth
(2) large amount of water present in the cloud 
(3) dense clouds are present in upper atmosphere
(4) mutual discharge of oppositely charged clouds resulting in coagulation

Tanning of leather is:
(1) Colouring of leather by chemicals
(2) drying to make the leather hard
(3) polishing of leather to make it look attractive
(4) coagulative hardening of leather by chemicals

When dilute aqueous solution of AgNO₃ (excess) is added to KI solutions, positively charged sol particles of AgI are formed due to absorption of which ion:
(1) K⁺
(2) Ag⁺
(3) O^2-
(4) S^2-

Amongst the electrolytes Na₂SO₄ , CaCl₂ , Al₂(SO₄)₃ and NH₄Cl, the most effective coagulating agent for Sb₂S₃ sol is 
(1) Na₂SO₄
(2) CaCl₂
(3) Al₂(SO₄)₃
(4) NH₄Cl

If wedge is being moved towards right with acceleration a, find acceleration of the block on top of the wedge.

(1) a tanθ
(2) a sinθ
(3) a cosθ
(4) None of the above

Find the minimum force with which, the wedge should be pulled so that the block falls freely.

(1) Mg tanθ
(2) Mg cosθ
(3) Mg sinθ
(4) Mg cotθ

If the truck starts moving with an acceleration of 5 m/s², find the time after which the block will fall down as per given figure below. Assume the distance between rear end and current position of block is 8m. Coefficient of friction between truck surface and block is 0.4

(1) Will not fall
(2) 4 seconds
(3) 2 seconds
(4) 8 seconds
 

Find the value of F, so that, there is no relative motion between A, B and C.

(1) (M+2m)g
(2) (M+4m)g
(3) (M+m)g
(4) (M+3m)g

Find force exerted by clamp on the pulley.

(1) g √((M+m)² + M²)
(2) g √(M² + m²)
(3) g √((M-m)² + M²)
(4) g √((M-m)² + M²)