Cells

Question 1

cells

Answer 1

cells are the smallest units from which all organisms are made

Question 2

electron micrograph

Answer 2

an image made using an electron microscope

Question 3

cell membrane

Answer 3

a very thin layer surrounding the cytoplasm of every cell; it controls what enters and leaves the cell

Question 4

partially membrane

Answer 4

allows some molecules and ions to pass through but not others

Question 5

cell wall

Answer 5

a tough layer outside the cell membrane only found in cells of plants fungi and bacteria not animal cells

Question 6

fully permeable

Answer 6

allows all molecule and ions to pass through it

Question 7

cytoplasm

Answer 7

the jelly like material that fills a cell

Question 8

metabolic reactions

Answer 8

chemical reactions that take place in living organism

Question 9

vacuole

Answer 9

a fluid filled space inside a cell separated from the cytoplasm by a membrane

Question 10

cell sap

Answer 10

the fluid that fills the large vacuoles in the plant cells

Question 11

vesicle

Answer 11

a very small vacuole

Question 12

nucleus

Answer 12

a structure containing DNA in the form of chromosomes

Question 13

chromosomes

Answer 13

a length of DNA found in a nucleus it contains genetic information in the form of many different genes

Question 14

DNA

Answer 14

a molecule that contains genetic information in the form of genes that controls the proteins that are made in the cell

Question 15

chloroplasts

Answer 15

small structures found inside some plant cells inside which photosynthesis takes place

Question 16

starch grains

Answer 16

tiny pieces of starch, made of thousands of starch molecules that are stored in some plants

Question 17

mitochondria

Answer 17

a small structure in a cell where aerobic respiration releases energy from glucose

Question 18

aerobic respiration

Answer 18

chemical reactions that take place in the mitochondria

Question 19

ribosomes

Answer 19

very small structures in a cell that use information on DNA to make Proteins molecules

Question 20

bacteria

Answer 20

unicellular organisms whose cells do not contain a nucleus

Question 21

prokaryotic cells

Answer 21

cells with no nucleus; bacteria have prokaryotic cells

Question 22

plasmids

Answer 22

small, circular molecules of DNA
found in many Prokaryotic cells in addition to the main much larger circle of DNA

Question 23

tissue

Answer 23

a group of similar cells that work together to perform a particular functions

Question 24

organ

Answer 24

a group of tissues that work together to perform a particular function

Question 25

organ system

Answer 25

several organs that work together to perform a particular function

Question 26

magnification

Answer 26

how many times larger an image is than the actual object