Cells

Question 1

Cell membrane

Answer 1

Outer membrane of cell that controls movement of substances in and out of the cell

Question 2

Cytoplasm

Answer 2

Liquid jelly where chemical reactions occur

Question 3

Nucleus

Answer 3

-Controls cell activity
-contains genetic material- DNA

Question 4

Nuclear membrane

Answer 4

Separates the nucleus from cytoplasm

Question 5

Chromosomes

Answer 5

A threadlike structure made of DNA, carrying genetic information in the form of genes

Question 6

Mitochondria

Answer 6

Releases energy through aerobic respiration

Question 7

Cellulose cell wall

Answer 7

Supports and protects the cell

Question 8

Permanent vacuole

Answer 8

-Contains cell sap
-help plants maintain shape
-provides cell turgour

Question 9

Chloroplasts

Answer 9

-Contains green pigment chlorophyll
-absorb light energy for photosynthesis

Question 10

Are plants living

Answer 10

Yes, they respire

Question 11

Similarities between animal cells and plant cells

Answer 11

-both have a nucleus
-both have a cell membrane

Question 12

Differences between animal cells and plant cells

Answer 12

-Animal cells have no cell wall and no chloroplasts
-plant cells have chloroplasts and a vacuole

Question 13

Circular chromosome

Answer 13

DNA that controls cell activity. Circular and free in cytoplasm

Question 14

Plasmids

Answer 14

Tiny circular sections of extra DNA

Question 15

Flagellum

Answer 15

Whip like structure used to move/swim

Question 16

Similarities between animal & pant cells and bacterial cells

Answer 16

-have cytoplasm
-have a cell membrane

Question 17

Differences between animal & pant cells and bacterial cells

Answer 17

-animal & pant cells have a nucleus & mitochondria
-bacterial cells have plasmids, loose DNA and no nucleus

Question 18

What is the role of the vacuole in plants

Answer 18

The vacuole holds water, so when a plant has no water it dries out and loses its shape

Question 19

2 structures In bacterial cells that contain DNA

Answer 19

-plasmids
-circular chromosomes

Question 20

Calculating magnifications

Answer 20

Magnification= size of image➗size of object

Question 21

Diffusion

Answer 21

Diffusion is the net movement of gas or dissolved molecules from an area of high concentration to an area of low concentration until equilibrium is reached
-diffusion is passive

Question 22

Equilibrium

Answer 22

When equilibrium is reached there is no net movement of particles in a particular direction

Question 23

How temperature effects the rate of diffusion

Answer 23

The higher the temp the more kinetic energy the particles have so the faster diffusion happens

Question 24

How concentration gradient effects the rate of diffusion

Answer 24

The bigger the concentration difference the steeper the concentration gradient and the faster diffusion happens

Question 25

How surface area effects the rate of diffusion

Answer 25

The larger the surface area the faster diffusion will happen

Question 26

Diffusion is particularly important in gas exchange

Answer 26

The movement of oxygen and carbon dioxide between the air and living organisms