Biology

Question 1

What is movement

Answer 1

Action by an organism or part of an organism causing a change of position or place

Question 2

What is respiration?

Answer 2

The chemical reactions in cells that break down nutrient molecules and release energy for metabolism

Question 3

What is sensitivity?

Answer 3

the ability to detect or sense stimuli in the internal or external environment and to make appropriate responses

Question 4

What is growth?

Answer 4

A permanent increase in size and dry mass by an increase in cell number or cell size or both

Question 5

What is reproduction?

Answer 5

The processes that make more of the same kind of organism

Question 6

What is excretion?

Answer 6

Removal from organisms of the waste poducts of metabolism, toxic materials and substances in excess of requirements

Question 7

What is nutrition?

Answer 7

Taking in of materials for energy, growth and development; plants require light, carbon dioxide, water and ions; animals need organic compounds and ions and usually need water

Question 8

What are living organisms made of?

Answer 8

Cells

Question 9

Describe the structure of a plant cell

Answer 9

Cell membrane, cell wall, chloroplast, cytoplasm, nucleus, vacuole

Question 10

Describe the structure of the animal cell

Answer 10

Nucleus, Cell membrane, Cytoplasm

Question 11

What is the function of the Nucleus?

Answer 11

Contains the genetic material(DNA) which controls the activities of the cell

Question 12

What is the function of cytoplasm?

Answer 12

A gel like substance composed of water and dissolved solutes. Also supports internal cell structures
Site of many chemical reactions including anaerobic respiration

Question 13

What is the function of the cell membrane?

Answer 13

Holds the cell together, separating the inside of the cell from the outside. Also control which substance can enter and leave the cell

Question 14

Function of ciliated cells

Answer 14

Movement of mucus in the trachea and bronchi

Question 15

Function of root hair cells

Answer 15

absorption

Question 16

Function of Palisade mesophyll cells

Answer 16

Photosynthesis

Question 17

Function of red blood cells

Answer 17

Transports oxygen

Question 18

Function of sperm and egg cells

Answer 18

Reproduction

Question 19

What is diffusion?

Answer 19

Net movement of particles from a region of high concentration to a region of low concentration

Question 20

What influences diffusion?

Answer 20

surface area, temperature, concentration gradients and diffusion distance

Question 21

What chemical elements make up carbohydrates, Fats and Proteins

Answer 21

Carbon, Hydrogen, Oxygen for all biomolecules
Proteins - Nitrogen, Sulfur, Phosphorus

Question 22

What molecules make up Starch and glycogen

Answer 22

Glucose

Question 23

What molecules make up proteins

Answer 23

Amino Acids

Question 24

What molecules make up fats and oils

Answer 24

Fatty acids and glycerol

Question 25

What is iodine solution used for

Answer 25

Test for Starch

Question 26

What is Benedicts solution used for

Answer 26

For reducing sugars

Question 27

What is Biuret used for

Answer 27

Test for proteins

Question 28

What is ethanol emusion test used for

Answer 28

oil and fats

Question 29

What are enzymes?

Answer 29

Proteins that function as biogical catalysts

Question 30

What is enzyme action?

Answer 30

Complementary shape of the active site of an enzyme and its substrate and the formation of a product

Question 31

What happens to the enzyme when temperature changes

Answer 31

Optimum temperature - Reaction increases - Molecules more kinetic energy - More successful collision
Over Optimum temperature - Enzyme denature - Active site changes shape - decreases reaction

Question 32

What happens to the enzyme when pH changes

Answer 32

If pH moves away from optimum pH - Rate of reaction decreases - Change in pH changes shape of active site