Key knowlage

Question 1

name the organelle that controls substances entering and leaving the cells

Answer 1

Cell membrane

Question 2

name a condition that may be treated with stem cells

Answer 2

diabetes or paralysis

Question 3

name an adaptation of a root hair cell

Answer 3

large surface area

Question 4

name the organelle that is the site of respiration

Answer 4

Mitochondria

Question 5

name the organelle that contains cell sap

Answer 5

vacuole

Question 6

state 3 conditions that can affect the rate of diffusion

Answer 6

concentration, temperature, surface area

Question 7

what is active transport

Answer 7

movement of particles from an area of low concentration to high concentration which requires energy from respiration

Question 10

where in the cell do the most chemical reactions take place

Answer 10

cytoplasm

Question 11

what type of cells are bacteria cells

Answer 11

prokaryotic

Question 12

name the organelle that is the site of photosynthesis

Answer 12

chloroplasts

Question 12

what is present in eukaryotic cells but not prokaryotic cells

Answer 12

a nucleus

Question 13

name the organelle that contains cellulose

Answer 13

cell wall

Question 13

name the circular piece of DNA found in bacteria cells

Answer 13

plasmid

Question 13

what is diffusion

Answer 13

movement of partials from an area of high concentration to low concentration

Question 14

what is osmosis

Answer 14

diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane

Question 16

name the organelle that controls cell activities

Answer 16

Nucleus

Question 17

name 1 adaptation that alveoli have to increase the rate of diffusion

Answer 17

thin cell membrane

Question 18

name the organelle that contains chlorophyll

Answer 18

chloroplasts

Question 19

name the adaptation of muscle cells

Answer 19

the ability to contract and relax

Question 19

describe an adaptation of a sperm cell

Answer 19

a long tail for movement

Question 21

what type of cells are plant and animal cells

Answer 21

eukaryotic

Question 21

write down the equation to calculate magnification

Answer 21

image size / actual size

Question 22

name the organelle that produces proteins

Answer 22

ribosomes

Question 23

what does active transport allow plants to absorb through their roots

Answer 23

minerals

Question 24

name one advantage that an electron microscope has over a light microscope

Answer 24

higher magnification and resolving power

Question 25

name the cell division that is important in growth and development

Answer 25

mitosis

Question 27

what type of cells can differentiate into any type of cell

Answer 27

stem cells

Question 28

where can stem cells be found in the human body

Answer 28

embryos or adult bone marrow

Question 29

where can stem cells be found in a plant

Answer 29

meristem tissue

Question 30

what happens to the genetic material in the first stage of mitosis

Answer 30

doubles