"Omnis-cellula-e-cellula" was given:

(a) Virchow

(b) Hooke

(c) Leeuwenhoek

(d) Brown.

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Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport ?

(a) Cell membrane

(b) Mitochondria

(c) Dictyosome

(d) Endoplasmic reticulum

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Specific proteins responsible for the flow of materials and information into the cell are called

(a) membrane receptors

(b) carrier proteins

(c) integral proteins

(d) none of these

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Who invented electron microscope ?

(a) Jansen

(b) Edison

(c) Knoll and Ruska

(d) Landsteiner

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What are Singer and Nicolson known for?

(a) One-gene-one-enzyme hypothesis

(b) Plasma membrane modifications

(c) Fluid-mosaic model of plasma membrane

(d) Structure of DNA

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What is a plasmid ?

(a) Bacterial, linear, dsDNA

(b) Extra chromosomal linear RNA

(c) Extra chromosomal circular dsDNA

(d) Autonomously replicating circular RNA

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Cell theory was proposed by

(a) a botanist

(b) a zoologist

(c) a botanist and a zoologist

(d) a psychologist.

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The microscope usually used for seeing living cells or tissues is

(a) compound microscope

(b) electron microscope

(c) phase contrast microscope

(d) light microscope.

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Which of the following organelles contain DNA?

(i) Mitochondria (ii) Chloroplasts (iii) Golgi bodies (iv) Ribosomes

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i) only

(d) (iv) only.

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Chromatin is made up of:

(a) DNA and protein

(b) DNA and histone

(c) DNA, RNA, protein

(d) RNA, histone and oil bodies.

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