knowledge questions

Question 1

name the organelle that controls the cells activities

Answer 1

nucleus

Question 2

name the organelle that controls substances entering and leaving the cells

Answer 2

cell membrane

Question 3

name the organelle that is the site of photosythesis

Answer 3

chloroplasts

Question 4

name the organelle that is the site of respiration

Answer 4

mitochondria

Question 5

name the organelle that produces proteins

Answer 5

ribosomes

Question 6

name the organelle that contains cell sap

Answer 6

vacuole

Question 7

name the organ that contains cellulose

Answer 7

cell wall

Question 8

name the organelle that contains chlorophyll

Answer 8

chloroplasts

Question 9

where in the cell does most of the chemical reactions take place

Answer 9

cytoplasm

Question 10

what type of cells are plant and animal cells

Answer 10

eukaryotic

Question 11

what type of cell are bacterial cells

Answer 11

prokaryotic

Question 12

what is present in eukaryotic cells but not prokaryotic

Answer 12

a nucleus

Question 13

name the circular piece of dna found in bacterial cells

Answer 13

plasmid

Question 14

what’s diffusion

Answer 14

movement of particles from an area of high to low concentration

Question 15

what’s osmosis

Answer 15

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

Question 16

what is active transport

Answer 16

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

Question 17

state the three conditions that can affect the rate of diffusion

Answer 17

concentration, temperature, surface area

Question 18

name 1 adaptation that alveoli have to increase rate of diffusion

Answer 18

large surface area

Question 19

what does active transport allow plants to absorb through their roots

Answer 19

magnesium ions

Question 20

name the adaption of muscle cells

Answer 20

ability to contract and relax

Question 21

describe the adaptation of a sperm cell

Answer 21

tail for movement, lots of mitochondria to transfer to tail, acrosome enzymes for breaking down the egg

Question 22

name an adaptation of a root hair cell

Answer 22

large surface area

Question 23

write the equation to calculate magnification

Answer 23

magnification = image size / actual size

Question 24

name one advantage 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 26

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

Answer 26

doubles

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

embryo’s or adult bone marrow

Question 29

where can stem cells be found in a plant

Answer 29

meristem tissue

Question 30

name a condition that may be treated with stem cells

Answer 30

diabetes or paralysis