Bio, Unit # 4, Cellular Basis of Life, F. Sc Part-1
The Cell
Define the following:
a. Phagocytes: Process whereby plasma
membrane of a cell encloses a particle in the external environment and traps
its within a food vacuole.
b. Pinocytosis: Ingestion of surrounding
fluid by a cell through localized invagination of its plasma membrane, which
thus completely surrounds
a minute drop of fluid and forms a vesicle.
c. Fluid Mosaic model: Current generalized
model for structure of all cell membranes. In this model globular protein molecules are embedded in the bilipid
layer in mosaic manner.
d. Active transport: It is the uphill
movement of material that requires energy, provided by ATP. During active
transport the movement of
material occurs against the concentration gradient.
e. Prokaryotes: Prokaryotes are the
.organisms formed of prokaryotic cells. The genetic material of prokaryotes is
not enclosed in the
nuclear membrane. The prokaryotes lack membrane bounded organelles such as
mitochondria and golgi apparatus.
f. Leucoplasts: They are colorless
plastid. Leucoplasts are triangular, .tubular or of some other shape. They are
found in under ground
parts of the plant and stored food.
Mark the most
appropriate answer.
1. The “Cell Theory” was proposed by
a. Robert Hooke & Leeuwenhoek b. Grew and Malpighi c. Schleiden.& Schwann d. Dutrochet & Brown
2. In 1831, nucleus was first observed in the .cells of
orchids under the microscope by .
a.
Robert Hooke b. Schwann c.
Robert Brown d. Dutrochet
3. Which of these factors affect the movement of substances
through the plasma membrane?
a.
Size of diffuzing particles b.
Permeability of the membrane
c.
Membrane Proteins d.
All of these
4. The
cell membrane is composed of
a.
Glycoproteins b.
Phosphoproteins b.
Phospholipid & protein d.
Proteins only
5. Cellulose
is present in
a.
Cell wall b. Ribosome c. Lysosome d. Proteins only
6. The
diffusion of a dissolved substance through a differentially permeable membrane
is
a.
Dialysis b.
Osmosis c. Imbibition d. Brownian movement
7. Rough endoplasmic reticulum
is mainly concerned with
a.
Proteolysis b. Fatty acid synthesis c. Protein
synthesis d. Cholesterol
synthesis
8. Which
of the following is called the “Power house” of the cell?
a.
Nucleus b. Mitochondria c. Chloroplast d.
Nucleolus
9. Cristae
occur in
a.
Mitochondria b.
Chloroplast c.
Lysosomes d. Spherosomes
10. Each
mitochondria is bounded by a double membrane of which
a.
The outer is folded into finger like folds and the inner is smooth
b.
The outer is smooth and the inner is folded into finger like folds
c.
Both are smooth d.
Both have folds
11. One
of the following is called the energy currency of the cell
a.
NAD b. FAD c. ATP d. FMN
12. Cellular
organelles containing hydrolytic enzymes are called
a.
Lysosome b. Microsomes c. Ribosomes d. Mesosomes
13. Protein
synthesis is dependent on
a.
Centerosome b. Lysosome c. Ribosome d. Plastids
14. Which
of the following organelles is specialized in photosynthesis?
a.
Chloroplast b. Chromoplast c. Leucoplast d. Mitochondria
15. Chromosome
is made of
a.
Polypeptides b.
Lipoprotein c. Phospholipis
d. Nucleoprotein
16. The
cells of cork were first studied inl665 by
a.
Robert Brown b. Robert
Hooke c. Dutrochet d. Schleiden
17. The
nucleus in the animal cell was first of all seen by
a.
Schwann b.
Schwann c. Schultz
d. Robert
Brown
18. The
impulses are transmitted from one l)art of the body to the other by means of
a.
Muscle cells b. Nerve
cells c. Gland
cells d. Skin cells
19. The various
components of the cells including their organelles can be isolated by the
process of cell
a.
Centrifugation b. Fractionation c. Homogenation d. Fragmentation
20. Besides
a small quantity of carbohydrate, the cell membrane is chemically composed of
lipids and
a.
Chitin b. Proteins c. Cellulose d. Cutin
21. The
substances which can easily pass through the cell membrane must be soluble in
a.
Lipid b. Water c. Alcohol d. Acetone
22. The
shape and rigidity of a plant cell depends upon its
a.
Cell wall b.
Cell membrane c.
Cytoplasm d.
Endoplasmic reticulum
23. The
soluble part of the cytoplasm contains about 90 % water and is known as the
a.
Cystol b.
Cytosol c. Lysosome
d. Lysosole
24. In plants
the Golgi apparatus is also referred to as
a.
Polysome b. Dictoyosome c. Lysosome d. Ribosome
25. Lysosomes
contain such proteolytic enzymes which can digest phagocytosed
a.
Lipids b.
Starches c. Proteins d. Sugars
26. A structure formed by the attachment of many ribosome’s with
the same stretch of messenger RNA is termed as
a.
Polysome b. Dictyosome c. Chromosome d. Lysosome
27. A heap of membranes in the inner part of the chloroplast of
a green cell is called a
a.
Crista b. Granum c. Murein d.
Golgi complex
28. The chromosomes are composed of DNA and
a.
RNA b. Genes c. Proteins d. Lipids
29. The entire cell wall of the prokaryotic cell is often
regarded as a single huge molecule known as .
a.
Cellulose b. Murein c. Nucleoprotein d, Lipoprotein
30. Which of the following functions as the site of protein
synthesis?
a.
6 b. 1 c. 4 d. 3
31. Which one of the following performs the important role of intracellular
transport?
a.
9 b. 3 c. 7 d. 11
32. In Eukaryotic cell, the kreb’s cycle is completed in tiny
structures called
a.
Mitochondria b. Lysosome c. Endoplasmic reticulum d. Chromosome
33. Normal size of Prokaryotic ribosome is
a.
90S b. 70S c. 80S d. 60S
34. Single membrane bounded organelle is
a.
Lysosomes b. Nucleus c. Chloroplast d. Mitochondria
35. Cork
a.
De Duvc b.
Galileo c. Robcrt
Hooke d. Dutrochet
36. The movement of
material against concentration gradient through cell membrane occurs by which
one of the following process?
a.
Cohesion b. Passive transport c.
Evaporation d. Active transport
37. Number of chromosomes in potato is
a.
47 b. 49 c. 46 d.
48
38. The site of the dark reaction of photosynthesis is
a.
2 b. 1 c. 4 d.
3
39. The 80S particles of Eukaryotic ribosomes are formed by
a.
50S and 70S b. 30S and 50S c.
20S and 40S d. 40S and
60S
40. The inner matrix that batches the cristae of mitochondria
contains
a.
DNA and nucleoplasm b.
Ribosomes and mRNA
c.
DNA, ribosomes and enzymes d.
RNA and enzymes
41. Nucleus is composed largely of
a.
rRNA b. Amino acid and tRNA c. RNA and DNA d. mRNA and tRNA
42. The various organelles of cell can be separated by a process
called
a. Centrifugation
b. Distillation c. Filtration d.
Chromatograph
43. Which of the following are specialized to contract and relax
a.
Gland-cells b. Red-black-celli- c.
Muscle-cells d.
Nerve-cells
44. Rihosomes
are composed of an equal amount of protein and
a.
DNA b. RNA c. Lipids d. Carbohydrates
45. Cristae are the membranous infolding in
a.
Plastids b. Golgi apparatus c. Lysosomes d.
Mitochondria
46. Rohert Brown was the person who
a.
Isolated lysosomes b. Discovered nucleus c. Observed cell wall d. Proposed cell theory
47. The Symbol ‘S’ (Svedberg) unit is more related to
a.
Solubility b. Sedimentation c. Discoverer d. Solid
48. The idea that cell is structure containing nucleus with its surrounding
fluid and an outer thin membrane was put
forth by
a.
Robert Hooke b. Theodar
Schwann c. Robert Brown d. Galileo
49. "It is outermost layer of the animal cell. It
is thin, delicate elastic and capable of limited self repair." The
statement is true for
a.
Cell wall b. Cell membrane c. Nuclear
membrane d. Middle
lamella
50. Cell
membrane allows some. of the soluble particles to pass through but prevents
others. This property is most ppropriate
to
the membrane, which is .
a. Impermeable b.
Permeable c. Selectively permeable
d. None of these
51. The
aqueous ground substance in the cell contains a variety of cell organelles,
wastes and storage products. It is mostly true
for
a.
Nucleus b. Cytoplasm c. Plasma membrane d. Endoplasmic reticulum
52. Which
of the following is not a membrane bound structure
a.
Endoplasmic reticulum b. Chromosome c. Lysosome d. Mitochondrion
53. The
cell-wall of prokaryotic cell is made up of
a.
Cellulose b. Maltose c. Murein. D. Lactic acid
54. In
plant cells the nucleus lies close to the cell-membrane due to the presence of
a.
Large size of nucleus b. Large central
vacuole c. Concentrated cytoplasm d. Large endoplasmic reticulum
55. Nucleus
is composed largely of
a. rRNA and protein b.
Amino acid and tRNA c. mRNA and tRNA d. RNA and DNA
56. In
a fern cell a typical mitochondrion is bounded by
a. One membrane b.
Two membrane c. Three membrane
d. Four membranes
57. Mitochondrion,
is an organelle bounded by a double membrane. Which statement is true for its
membranes?
a.
Inner is smooth b.
Outer is smooth c. Both
inner and outer ware smooth d.
None of these
58. The
cross section of each centriole indicates that it consists of
a.
21 microtubules b. 23
microtubules c. 25
microtubules d. Microtubules
59. French
Botanist Henri Dutrochet used which chemical to study cells in his experiment?
a. Citric acid b. Acetic acid c. Nitric acid d. Succinic acid
60. Which
of the following is not membranous organelle?
a. Ribosome’s b.
Mitochondria. C.
Endoplasmic reticulum d.
Lysosomes
61. In
mammalian cell the term protoplasm is applied for
a. Nucleus and nucleolus b. Ribosome and nucleolus
c. Nucleus and cytoplasm d. Cell membrane and cytoplasm
62. Glycolysis is an
important metabolic process and occurs in
a.
Mitochondria b. Cristae c. Cell-membrane d.
Cytoplasm
63. Food in plants is transported by
a. Phloem
b. Parenchyma c.
Sclerenchyma d. Xylem
64. Which one of the following detoxifies the harmful effect of
drugs in the cell?
a. Golgi apparatus b.
Rough endoplasmic reticulum
c. Smooth endoplasmic reticulum d. Mitochondria
65. Cell
secretions are processed and packed in
a. Endoplasmic reticulum b. Golgi apparatus c.
Mitochondria d. Centriole
66. First formed wall between the adjacent cells is
a. Primary cell wall b.
Secondary cell wall c. Middle lamella
d. Cytosol
67. Centrioles in higher plants are
a. Small b. Two in number c. Large d. Absent
68. The grana is the site where
a. Oxygen is stored b.
Food is stored c. Sunlight
is trapped d. CO2
is stored
69. Ribosomal RNA (rRNA)is synthesized and stored in
a.
Nucleolus b. Nucleus c.
Golgi apparatus d.
Endoplasmic reticulum
70. Golgi apparatus in plants is also called
a. Lysosome b. Ribosome c. Dictyosome d. Mesosome
71. The plasma membrane does Rot allow free passage of
a. Sugar molecules b.
Water molecules c. Ions d. Lipids soluble substances
72. Membrane bounded pigment containing bodies present in the plant
cell are
a. Centrioles b. Plastids c. Dictysomes d. Lysosomes
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