Topic 1 - Key Concepts In Biology

Question 1

What’s on a plant call ?

Answer 1

Plant cell = nucleus, cell membrane, cell wall , chloroplasts , mitochondria, vacuale , ribosome

Question 2

What’s on an Animal cell ?

Answer 2

Nucleus, cell membrane, ribosome , mitochondria

Question 3

What is the difference between a plant cell and animal cell ?

Answer 3

Animal cell has no cell wall or chloroplast

Question 4

How is a sperm cell adapted to its function ?

Answer 4

1. Mitochondria and a tail
2. Acrosome
3. Haploid nucleus

Question 5

How is an egg cell adapted?

Answer 5

1. Haploid nucleus
2. Nutrients in the cytoplasm
3. Changing in cell membrane after fertilisation
4. Arrow shaped head

Question 6

What are the 2 types of cells

Answer 6

Prokaryotic and eukayriotic

Question 7

What do bacterial cells not have ?

Answer 7

A nucleus

Question 8

What are enzymes ?

Answer 8

Catalysts produced by living things

Question 9

What is a Catalyst ?

Answer 9

A substance which increases the speed of a reaction without being changed or being used up

Question 10

What does every enzyme have ?

Answer 10

A active site

Question 11

What does a substrate do with an enzyme ?

Answer 11

It fits in the active site

Question 12

What does an enzyme need to be right for the substrate to fit

Answer 12

1. Right temp
2. Right ph
3. Right substrate concentration

Question 13

What enzyme breaks down starch ?

Answer 13

Amylase enzymes

Question 14

What enzymes break down proteins ?

Answer 14

Protease enzymes

Question 15

What’s enzyme breaks down lipids

Answer 15

Lipase enzyme

Question 16

Define diffusion ?

Answer 16

The movement of particles for a high concentration area to a lower concentration area

Question 17

Define active transport ?

Answer 17

The movement of particles from a low concentration area to a high concentration area

Question 18

Define osmosis

Answer 18

The movement of moloceaus across a partially permeable surface from a high concentration area to a lownone

Question 19

Nucleus characteristics ?

Answer 19

1. Contains genetic material
2. Genetic material arranged into chromosomes

Question 20

Mitochondria :

Answer 20

Where aerobic representation takes place

Question 21

Cell membrane :

Answer 21

Holds cell together and controls what goes in and out

Question 22

Cytoplasm :

Answer 22

Gel like substance where most of the chemical reactions happen

Question 23

Ribosome :

Answer 23

These are involved in translation of genetic material

Question 24

Chloropasts :

Answer 24

This is where photosynthesis takes place which makes food to the plant