Term 2 Test

Question 1

Which cells have no nucleus?

Answer 1

Red blood cells Bacteria, fungi

Prokaryotic

Question 2

Cell cycle

Answer 2

Interphase, mitosis, cytokinesis

Question 3

Where are chromosomes found

Answer 3

I’m nucleus

Question 4

What are chromosomes?

Answer 4

Thread like strands of DMA

Question 5

How many chromosomes in a female cell

Answer 5

22 pairs and one x

Question 6

How many chromosomes in a male?

Answer 6

22 pairs with x and y

Question 7

How many chromosomes in humans

Answer 7

46

Question 8

What do genes carry

Answer 8

Instructions for making protein

Question 9

What does Adeline bond to?

Answer 9

Thymine

Question 10

Cytosine always hinds to?

Answer 10

Guanine

Question 11

Chemical bases in dna

Answer 11

Adeline, thymine, guanine, cyasine

ATGC

Question 12

What is a gene?

Answer 12

A gene is a short section of dna that codes for protein

Question 13

What is mitosis?

Answer 13

Mitosis is a form of nuclear division that produces a genetically identical copy of the cell

Question 14

When does mitosis occur?

Answer 14

Growth of multicellular organism, repair damaged tissue, asexual reproduction in some reproduction

Question 15

Cell cycle of mitosis

Answer 15

The first stage of the cell cycle is interface then prophase - where the nuclear membrane breaks down also copies each chromosome . After that we have metaphase the Chrom line up across center of the cell . Then we have anaphase- one set of chromosome which means is pulled to each end of the cell. Then we have telophase where the nucleus is divided. Finally we have cytokenises - the cytoplasm in cell membrane divide to form two genetically identical cells.

Question 16

Health definition

Answer 16

Health is a persons physical, mental and social well being with absense of disease

Question 17

Why do we need good health

Answer 17

To grow and reach their full potential
Play a full and active part in society

Question 18

Good health is maintained by

Answer 18

Free from disease
Happy positive outlook

Question 19

Disease definition

Answer 19

Disease is a disorder malfunction of the mind/ body which leads to poor health

Question 20

Disease characteristics

Answer 20

Characterised by single and multi factor that are physical, mental or both

Question 21

Communicable disease

Answer 21

Caused by bacteria, virus, protis and fungi

Question 22

What does cells exchange with their surroundings and how

Answer 22

Oxygen, glucose, and after and carbon dioxide

Diffusion, osmosis and active transport

Question 23

Diffusion definition

Answer 23

Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration

Question 24

Are cell membranes solid?

Answer 24

No and they have a lot of pores and gaps

Question 25

Does diffusion need energy?

Answer 25

No! It is a passive process

Question 26

What often occurs across cell membranes in biological systems?

Answer 26

Diffusion

Question 27

What does the rate of diffusion depend on

Answer 27

How steep the concentration gradient is The higher the temperature the more kinetic energy so faster they move Total surface area of the cell membrane that the particles have to diffuse

Question 28

What does the rate of diffusion depend on

Answer 28

How steep the concentration gradient is The higher the temperature the more kinetic energy so faster they move

Question 29

Osmosis definition

Answer 29

The diffusion of water from a dilute to more concentrated solution across a partially permeable membrane

Question 30

Stem cells

Answer 30

They are unsoecialised and undifferential Can relocate themselves and divide over and over again to form clines

Question 31

Embryonic cells

Answer 31

Adult stem cells are more limited and specialized than embryonic stem cells.