Cells

Question 1

Describe the nucleus

Answer 1

Large organelle 
-
Surrounded by nuclear envelope (contains pores)
-
Contains nucleolus and chromatin

Question 2

Function of nucleolus

Answer 2

Makes ribosomes

Question 3

What is the function of pores

Answer 3

Allow substances (e.g RNA) to move between nucleus and cytoplasm

Question 4

Describe Lysosome

Answer 4

No clear internal structure

Question 5

What sort of nucleus do sperm and ovum’s (egg cell) have

Answer 5

Haploid nucleus (restores diploid number at fertilisation)

Question 6

Function of Lysosomes

Answer 6

Contains digestive enzymes used to break down invading cells or work out components

Question 7

Description of ribosome

Answer 7

• Very small organelle

- Either floats free or attached to RER

Question 8

Function of ribosomes

Answer 8

Site where proteins are made

Question 9

Description of RER

Answer 9

Surface is covered in ribosomes

Question 10

Function of RER

Answer 10

Folds and processes proteins made at ribosomes

Question 11

Structure of SER

Answer 11

Same as RER but no ribosomes

Question 12

Function of SER

Answer 12

Makes and processes lipids

Question 13

Structure of Golgi apparatus

Answer 13

Group of membrane bound flattens sacs

Question 14

Function of Golgi apparatus

Answer 14

Processes and packages new lipids and proteins

Question 15

Structure of mitochondrion

Answer 15

• Double membrane
• inner one is folded to form cristae
• inside is matrix

Question 16

Function of mitochondrion

Answer 16

Very active and require lots of energy

Question 17

Structure of centrioles

Answer 17

Hollow cylinders made of microtubules

Question 18

Function of centrioles

Answer 18

Separation of chromosomes in cell division

Question 19

What is tissue

Answer 19

A group of similar cells specialty adapted to work together to carry out a function

Question 20

What is an organ

Answer 20

Group of different tissues that work together to preform a function

Question 21

What is an organ system

Answer 21

Organs work together to form an organ system