UNIT 2 (topic 1) animal and plant cells

Question 1

parts of a nucleus and their functions

Answer 1

• nucleus - contains DNA and codes for proteins
• nuclear pores - allows movement of large molecules
• nucleolus - location of genes and produces ribosomes
• nuclear envelope - double membraned to control entry and exit of materials

Question 2

function of the cell membrane

Answer 2

phospholipid bilayer to control entry and exit of substances

Question 3

function of the golgi body

Answer 3

collects protein vesicles, modifies proteins and produces lysosomes

Question 4

function of mitochondria

Answer 4

site of aerobic respiration and produces ATP

Question 5

what does the mitochondria contain

Answer 5

• inner and outer membrane folds to form cristae
• matrix contains enzymes

Question 6

function of the rough endoplasmic reticulum

Answer 6

synthesises and transports proteins due to ribosomes attached

Question 7

function of the smooth endoplasmic reticulum

Answer 7

synthesises and transports lipids and carbohydrates

Question 8

function of ribosomes

Answer 8

site of protein synthesis
- 80s type made of ribosomal RNA and proteins

Question 9

function of lysosomes

Answer 9

contains digestive enzymes that breaks down worn out substances

Question 10

function of vesicles

Answer 10

transports substances around the cell

Question 11

name organelles that are found in plant cells but not animal cells

Answer 11

chloroplasts, cell wall, vacuole

Question 12

function of chloroplasts

Answer 12

site of photosynthesis

Question 13

what does the chloroplasts contain

Answer 13

thylakoid - contains chlorophyll
granum - stacked thylakoid to make a large surface area
double membrane - very selective
stroma contains enzymes