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BIOLOGY > Cell > Flashcards

Cell Flashcards

1
Q

The —— are called the suicidal bags.

A

lysosomes

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2
Q

Longest cells are ———.

A

nerve cells

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3
Q

——– are colourless plastids.

A

leucoplasts

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4
Q

The most important part of the cell is ———-.

A

nucleus

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5
Q

——– is a Prokaryotic cell.

A

cyanobacteria

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6
Q

The —— is the structural and functional unit of all living beings.

A

cell

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7
Q

The total living substance of a cell is called the ——-.

A

protoplasm

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8
Q

Cell parts having a definite shape, structure and definite function are called ——-.

A

organelles

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9
Q

Chromosomes are composed of hereditary units called ——-.

A

genes

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10
Q

Cells containing a well-defined nucleus are called ——–.cells.

A

eukaryotic

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11
Q

———– are called the powerhouse of the cell.

A

mitochondria

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12
Q

———- pigment is not associated with Plastids.

A

anthocyanins

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13
Q

Function of Ribosomes is to bring about ——– synthesis.

A

protein

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14
Q

——– are found in animal cells only.

A

centrosomes

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15
Q

Cytoplasm + nucleus = ———–.

A

protoplasm

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16
Q

Define Cell.

A

The cell is the fundamental structural and functional unit of all living beings. It is the smallest part of the body of an organism which is capable of independent existence and of performing the essential functions of life.

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16
Q

Define Cell.

A

The cell is the fundamental structural and functional unit of all living beings. It is the smallest part of the body of an organism which is capable of independent existence and of performing the essential functions of life.

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17
Q

T/F
Every cell has it’s own life.

A

True

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18
Q

T/F
Every cell has it’s own life.

A

True

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19
Q

T/F
All organisms including ourselves, start life as a single cell called the EGG.

A

True

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20
Q

T/F
All organisms including ourselves, start life as a single cell called the EGG.

A

True

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21
Q

The first microscope was invented by a Dutch scientist __________

A

Antony Von Leeuwenhoek

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21
Q

The first microscope was invented by a Dutch scientist __________

A

Antony Von Leeuwenhoek

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22
Q

Leeuwenhoek’s microscopes consisted of _________ and were called ______

A

single biconvex lens,
simple microscopes

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22
Leeuwenhoek's microscopes consisted of _________ and were called ______
single biconvex lens, simple microscopes
23
Simple microscopes had a magnifying power of up to ______ times.
200
23
Simple microscopes had a magnifying power of up to ______ times.
200
24
________ , and English scientist, developed a microscope by using _____ for achieving greater magnification
Robert Hooke, Two lenses
25
Robert Hooke's microscopes were called ______ microscopes and had a magnifying power of about _______ times
Compound 2000
26
In Hooke's microscope the object to be seen was placed on the stage below and light from a/an _________ was thrown on it by means of a _____________
oil lamp, concave mirror
26
In Hooke's microscope the object to be seen was placed on the stage below and light from a/an _________ was thrown on it by means of a _____________
oil lamp, concave mirror
27
___________ coined the term cells after examining a piece of _________- under _________
Robert Hooke cork Compound microscope
27
___________ coined the term cells after examining a piece of _________- under _________
Robert Hooke cork Compound microscope
28
The ordinary compound microscope uses light which is __________ to magnify the image
bent by glass lenses
29
The ordinary compound microscope uses light which is __________ to magnify the image
bent by glass lenses
30
The electron microscope can give a magnification of over ________ times and uses ___________ which are ____________ to magnify the image
200,000 beams of electrons bent by magnets
31
________, a German botanist, announced that _____________ and that _____________.
Matthias Schleiden every plant is made up of a large number of cells each of these cells performed various life processes
31
________, a German botanist, announced that _____________ and that _____________.
Matthias Schleiden every plant is made up of a large number of cells each of these cells performed various life processes
32
_________, a German zoologist, declared that ___________
Theodor Schwann all animals and plants are composed of cells, which serve as a basic unit of structure and function
33
________ made an addition to the cell theory by saying that ________________
Rudolf Virchow all cells arise from pre-existing cells
34
State the cell theory
The cell theory states three major points 1. The cell is the smallest unit of structure of all living things 2. The cell is the unit of function of all living things 3. All cells arise from pre-existing cells
35
Larger an organism, ________ the number of cells in its body
greater
36
Examples of single-celled organisms
Bacteria, amoeba, yeast
37
Examples of few-celled organisms
Spirogyra, volvox
38
Examples of multi-celled organisms
Human beings, mango
39
Smallest cells
Bacteria
40
Smallest cells in human body
Red blood cells
41
Longest cells
Nerve cells
42
Largest cells
Ostrich egg
43
Why do cellls generally remain small in size?
1. Different regions of a cell can communicate with each other rapidly for the cell to function effectively 2. Cells have a larger surface area to volume ratio for greater diffusion of substances in and out of the cell
44
_______ are circular and biconcave, to _________
Human red blood cells pass through narrow capillaries and transport oxygen
44
_______ are circular and biconcave, to _________
Human red blood cells pass through narrow capillaries and transport oxygen
45
White blood cells are ________ that can squeeze out through capillary walls
amoeboid
46
Nerve cells are long to ____________
conduct impulse from distant parts of the body to the brain and vice-versa
47
Muscle cells are ______ and ________ to pull or squeeze the parts
long contractile
48
_________ of _____ in the leaves are bean-shaped to open and close the pore
Guard cells stomatal pore
49
What are the three essential parts that a generalized cell consists of?
Cell membrane (plasma membrane) Nucleus Cytoplasm
50
What are cell organelles?
Cell organelles are living parts of a cell having a definite shape, definite structure and definite function.
50
What are cell organelles?
Cell organelles are living parts of a cell having a definite shape, definite structure and definite function.
51
The permeability of the cell membrane is _______
selective
52
The cell wall is ________ permeable and is made of _______
freely cellulose
53
The cell wall gives shape and a certain degree of _____ to cell
rigidity
54
Cotton, jute and coconut fibres are the _____ of their dead cells
cell walls
55
T/F Cytoplasm is a semi-liquid substance and appears to be colourless, translucent and some what gelatinous
False Cytoplasm is a semi-liquid substance and appears to be colourless, partly transparent and some what watery
55
T/F Cytoplasm is a semi-liquid substance and appears to be colourless, translucent and some what gelatinous
False Cytoplasm is a semi-liquid substance and appears to be colourless, partly transparent and some what watery
56
T/F Living cytoplasm is always at rest
False Living cytoplasm is always in some state of movement
57
Each human body cell has _____ chromosomes
46
58
Each human body cell has ______ of chromosomes
23 pairs

BIOLOGY (9 decks)

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