What is common between chloroplasts, chromoplasts and leucoplasts ?

(1) Presence of pigments

(2) Possession of thylakoids and grana

(3) Storage of starch, proteins and lipids

(4) Ability to multiply by a fission-like process

Subtopic:  Plastids |
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"Omnis-cellula-e-cellula" was given:

(1) Virchow

(2) Hooke

(3) Leeuwenhoek

(4) Brown.

Subtopic:  Cell Theory |
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Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport ?

(1) Cell membrane

(2) Mitochondria

(3) Dictyosome

(4) Endoplasmic reticulum

Subtopic:  Intro to Endomembrane System: Endoplasmic Reticulum |
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Specific proteins responsible for the flow of materials and information into the cell are called

(1) membrane receptors

(2) carrier proteins

(3) integral proteins

(4) none of these

Subtopic:  Cell Membrane |
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Who invented electron microscope ?

(1) Jansen

(2) Edison

(3) Knoll and Ruska

(4) Landsteiner

Subtopic:  Cell Theory |
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What is a plasmid ?

(1) Bacterial, linear, dsDNA

(2) Extra chromosomal linear RNA

(3) Extra chromosomal circular dsDNA

(4) Autonomously replicating circular RNA

Subtopic:  Prokaryotic Cell Organisation |
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Cell theory was proposed by

(1) a botanist

(2) a zoologist

(3) a botanist and a zoologist

(4) a psychologist.

Subtopic:  Cell Theory |
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Which of the following organelles contain DNA?

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

(1) (i) and (ii)

(2) (ii) and (iii)

(3) (i) only

(4) (iv) only.

Subtopic:  Nucleus: Chromosomes |
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Chromatin is made up of:

(1) DNA and protein

(2) DNA and histone

(3) DNA, RNA, protein

(4) RNA, histone and oil bodies.

Subtopic:  Nucleus: Chromosomes |
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Which one of the following is correct for the transmembrane proteins in lipid bilayer of plasma membrane?

(1) They are absent in animal cells.

(2) They act as channel proteins.

(3) They are absent in plant cells.

(4) They are only externally located

Subtopic:  Evidence for Fluidic Nature of Membrane |
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