Cell-Structure and Functions

Question 1

Who discovered cells

Answer 1

Robert Hooke

Question 2

When were cells discovered

Answer 2

1665

Question 3

Who put forward the cell theory of life

Answer 3

Mathias Schleiden and Theodor Schwann

Question 4

When was the cell theory of life put forward

Answer 4

1838

Question 5

Name some unicellular organisms

Answer 5

Amoeba, Paramecium, Euglena

Question 6

How many cells in the human body

Answer 6

100 trillion

Question 7

size of ostrich egg

Answer 7

170 mm * 130 mm

Question 8

smallest cell of the world

Answer 8

bacterial cell

Question 9

bacterial cell size

Answer 9

0.0001 mm * 0.0005 mm

Question 10

Diameter of RBC

Answer 10

0.007 mm

Question 11

Diameter of Average cell

Answer 11

0.02 mm

Question 12

Name origin of cytoplasm

Answer 12

kytos means hollow and plasma means liquid

Question 13

Other name of cell membrane

Answer 13

Plasma Membrane

Question 14

plant cells have have a _____ that animal cells don’t have

Answer 14

cell wall

Question 15

Present in the cytoplasm are small structures known as ______

Answer 15

organelles

Question 16

____ part of the cell can be compared to the brain in anmials

Answer 16

nucleus

Question 17

the liquid in the nucleus is called _____

Answer 17

nucleoplasm

Question 18

chromosomes carry ____

Answer 18

genes

Question 19

nucleus and cytoplasm together form the ____

Answer 19

protoplasm

Question 20

structure of mitochondria

Answer 20

rod-like

Question 21

role of mitochondria

Answer 21

oxidizing food for energy

Question 22

nickname of mitochondria

Answer 22

powerhouse of the cell

Question 23

____ are sac-like structures in the cell

Answer 23

vacuoles

Question 24

do animals have larger vacuoles than plants

Answer 24

no

Question 25

Plant cells have organelles known as _____ present in the cytoplasm

Answer 25

plastid

Question 26

Green colored plastids are known as _____

Answer 26

chloroplasts

Question 27

role of endoplasmic reticulum

Answer 27

help transport substances within the cell

Question 28

role of ribosomes

Answer 28

make protiens

Question 29

role of lysosomes

Answer 29

destroy old cell structures

Question 30

role of centrosomes

Answer 30

regulate cell division

Question 31

projections in paramecium are known as ____

Answer 31

cilia

Question 32

projections in euglena

Answer 32

flagella

Question 33

how many chromosomes in the normal human cell?

Answer 33

23

Question 34

what are eukarayotes

Answer 34

well developed cells

Question 35

word origin of eukaryotes

Answer 35

eu = true, karyon = nucleus

Question 36

prokaryotes word origin

Answer 36

pro = primitive, karyon = nucleus

Question 37

Electron microscope magnification

Answer 37

50,000 times

Question 38

the first commercial electron microscopes were sold in the _____

Answer 38

1930s

Question 39

new cells formed by cell division are known as _____

Answer 39

daughter cells

Question 40

which cells cannot divide

Answer 40

nerve cells