Cell and Cell Cycle topic based MCQs preparation test for all competitive exam. Cell and Cell Cycle Chapter# 2, topic based MCQs that are mostly asked in competitive exam related to Biology. Examtry team design a series of MCQs based tests that effectively and efficiently help a student or job seeker to prepare their exam effectively and efficiently.
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1 - Who coined the term CELL?
Robert Hook
2 - Who opposed the idea the cell is an empty space bounded by thick wall?
Robert Brown
3 - Who first observed and thus hypothesized that new cells are formed from previously existing living cell?
Rudolph Virchows
4 - Magnifying power of electron microscope as compared to eye is
250000X
5 - In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon:
Both a and b
6 - Percentage of proteins in cell membrane is
60-80%
7 - Which of the statement about cell membrane is not true?
It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.
8 - Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called
Passive transport
9 - The first layer of cell wall which is formed is:
Primary wall
10 - Cellulose is the major component of
Primary wall
11 - Strengthening material of prokaryotic cell wall is
Peptidoglycan or Murein.
12 - Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called
Cisternae
13 - Whone is not the function of endoplasmic reticulum?
Synthesis of conjugated molecules
14 - Factory of ribosomal systhesis is
Nucleolus
15 - 60S and 40S subunit combine to form ______ particle
80 S
16 - A group of ribosomes attached to mRNA is known as
Polysomes
17 - Pancreas produces secretory granules that help in digestion. These granules after passing through endoplasmic reticulum are pinched off from ______ surface of Golgi apparatus:
Maturating face
18 - During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparantus are called
Secondary lysosomes
19 - Autophagosomes are
Both a and b
20 - Cellular organelles related with H2O2 are
Peroxisomes
21 - Which of the following statement is incorrect about Glyoxisomes?
They are present through out life of a plant and provide them whth energy through Glyoxylate cycle.
22 - Which of the following cytoskeletal fiber contain tubulin protein?
One which help in assembly of spindles during mitosis.
23 - Centrioles are composed of ________ triplets of microtubules.
9
24 - The human naked eye can differentiate between two points which are _______ apart.
1.0 mm
25 - Ribonucleo-protein particles are the name of
Eukaryotic ribosomes
26 - Ribosomes + m-RNA
Polysome
27 - In golgi apparatus the maturing face is
Concave
28 - Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by
Golgi apparatus
29 - Amoeboid movements and movement of cyclosis is due to
Microfilaments
30 - Of the following which one is not the characteristic of mitochondria?
Number of mitochondria is constant
31 - Chlorophyll is a/an _____ molecule
Organic
32 - The part of chloroplast where CO2 is fixed to manufacture sugar is
Stroma
33 - The type of plastids which help in pollination is
Chromoplasts
34 - Ribosomes are assembled in
Nucleolus
35 - The place of centromere where spindle fibres get attached is
Kinetochore
36 - Which of the following is not present in mitochondria?
Thylakoids
37 - The stent energy in the form of ADP is regenerated by mitochondria into:
ATP
38 - Which of the following combination is an example of self replicating organelles?
Mitochondria Chloroplast
39 - Chlorophyll molecule contrains ________ as central metal ion.
Mg2+
40 - On which of the following component of chloroplast chlorophyll is arranged?
Thylakoids
41 - Which of the following impart a red colour to Rose petals?
Chromoplast
42 - Number of nuclear pores/nucleus in an RBC are
3?4
43 - Period between two consecutive divisions is called
Interphase
44 - DNA is synthesized and chromosome number is doubled in
S phase
45 - In case of neurons, post mitotic cell escapes cell cycle and remain in _______ phase whthout proliferating further
G0 phase
46 - Mitosis occurs in
Both diploid and haploid cells
47 - Microtubules are composed of
Tubulin protein and traces of RNA
48 - From each pair of centrioles ________ sets of microtubules originate
3
49 - Mitotic apparatus in animals is formed by
Aster and spindle
50 - A special area of centromere with specific base arrangement and specific proteins where spindle fibers are attached is called
Kinetochore
51 - Each kinetochore gets ________ fibers in mitosis
2
52 - Most critical phase of mitosis is
Anaphase
53 - Reverse of prophase is
Telophase
54 - In plants mitotic apparatus consists of
Spindles only
55 - Which statement is not true about phragmoplast?
Formed at the end of anaphase
56 - Spread of tumor cells and establishment of secondary areas of growth is
Metastasis
57 - Which is a feature of malignant tumor?
Metastasize
58 - Feature of cancer cells in common?
All of these
59 - Meiosis occur in
Diploid cells only
60 - Meiosis occurs at the time of
Both a and b
61 - Interphase of meiosis lacks
G2 phase
62 - Homologous chromosomes are
Similar but not identical
63 - The longest phase of meiosis I is
Prophase
64 - Tetrad or bivalent is
Paired homologous chromosome but not fused complex structure
65 - Pairing of homologous chromosomes is completed in
Pachytene
66 - Each bivalent has
4 chromatids
67 - Crossing over occurs between
Non sister chromatids
68 - Inability of chromosomes to segregate during anaphase and telophase of meiosis is called
Chromosomal nondisjunction
69 - Which statement is incorrect?
In Down's syndrome sperms are commonly involved
70 - Apoptosis
Internal programme of events by which cell commits suicide
71 - A cell of human being has 46 chromosomes; it divides to form some daughter cells, each having 23 pairs of chromosomes. The division would be
Mitosis
72 - Mitosis takes place during
All of these
73 - Which of the following category comes under Turner's syndrome?
A female having only 1 X chromosome
74 - Morphology of chromosomes is best studied during
Metaphase
75 - Cytokinins refers to
Division of cell
76 - Which fibers intedigitate with each other?
Polar fibers
77 - Cancer cells are
Less differentiated
78 - Crossing over in meiosis occurs during
Pachytene
79 - Which division does not show replication of chromosomes?
Meiosis II
80 - A significant happening of meiosis is / are
Both of these
81 - Jacob's syndrome can be represented as
XYY
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