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Flashcards in Paper 3 Deck (29):
1

Complete the following
Group: Features: Example:
Bacteria. 1-
2-

Features:
Single celled
Lack nucleus

Example:
Lactobacillus

2

Complete the following
Group: Features: Example:
1- parasitic Tabacco
2- only reproduce. Mosaic
Inside living cells

Virus

3

Join the following words together

Organelle. Palisade cell
Cell. Mitochondria
Tissue. Heart
Organ. Phloem
System. Circulation

Organelle-mitochondria
Cell-palisade cell
Tissue-phloem
Organ-heart
System-circulation

4

Organelle. Which of these levels of
Cell. organisation does a
Tissue. Chloroplast belong to?
Organ.
System.

Organelle

5

Below are the genotypes of four children

NN Nn Nn nn

How many are homozygous?

2

6

People with cystic fibrosis cannot easily digest food because the digestive enzymes they need are not present in part of the small intestines (duodenum).

Suggest why the digestive enzymes are not present in the duodenum.

Pancreatic duct blocked/no enzymes from pancreas

7

People with cystic fibrosis cannot easily digest food because the digestive enzymes they need are not present in part of the small intestines (duodenum).

One way of treating cystic fibrosis is for people to take tablets containing digestive enzymes with their meals.

Suggest three different types of digestive enzymes that might be in the tablets

Amylase/ maltase/ carbohydrase/ protease/ trypsin/ pepsin/ lipase

8

People with cystic fibrosis cannot easily digest food because the digestive enzymes they need are not present in part of the small intestines (duodenum).

One way of treating cystic fibrosis is for people to take tablets containing digestive enzymes with their meals.

Suggest why enzymes in the tablets might not work if they had been released in the stomach rather than the small intestine (2 marks)

Enzymes are broken down in the stomach

Broken down by stomach enzyme/acid

9

Farmers have attempted to increase the yield of crop plants by the us of glasshouses and fertiliser.

Explain how the use of glasshouses and fertiliser can result in an increasing crop yield. (6 marks)

Increase in temperature

Increase rate of reaction/rate of reaction controlled

Increase carbon dioxide for photosynthesis

Increased nitrate Used for amino acids

For new cell growth

Increase in a mineral e.g. magnesium

10

Name the two main parts that make up the central nervous system

Brain
Spinal chord

11

Complete the table below to show how the nervous system works

Speed of conductions?
Message carried by...
Duration of response...
Nature of message....

Fast
Neurone/nerves
Short
Electrical

12

Complete the table below to show how the hormonal system works

Speed of conductions?
Message carried by...
Duration of response...
Nature of message....

Slow
Blood/blood vessel
Long
Chemical

13

What is the name of the process that releases energy in living organisms?

Respiration

14

What is the word equations photosynthesis?

Glucose + oxygen --> carbon dioxide + water

15

Describe how air is taken into the lungs (3 marks)

Intercostal muscles contract
Diaphragm contracts
Rinse move on and out
Thorax volume increases
Thorax pressure decreases

16

When people do not have enough oxygen to respire Aerobically, they respire in a different way. This respiration causes cramp.

What is the name of the substance that causes cramp?

Lactic acid

17

Give two functions of the ovary

Release/develop eggs

Secrete oestrogen

18

Females have separated reproductive and urinary passages. In males, these passages are combined.

Give their name of this combined passaging males

Urethra

19

Complete:

Red blood cells contain the pigments……., Which transports…….White blood cells prevent…….By engulfing pathogens or by producing…….To destroy them.

Haemoglobin
Oxygen
Disease/infection
Antibodies

20

Complete:

The plasma is the liquid part of the blood and transports various waste substances including…….And…….If the skin is cut, cell fragments known as…….Prevent further blood loss by helping to……… The blood

Urea
Carbon dioxide
Platelets
Clot

21

What word used to describe the water loss from the leaves of a plant?

Transpiration

22

Suggest how hairs and the upper and lower surface of leaves would affect the rate of water loss from a leafy shoot (2 marks)

Reduces water loss

Hairs trap moist air

Reduces concentration/diffusion gradient

23

Describing explain three different ways a fish farmer can help to increase the yield of fish
(6 marks)

Control predation
Cover ponds with net

Control disease
Use antibiotics

Control water quality
Filter out nitrogenous waste

24

What do the arrows in a food web represent?

Flow of energy

25

Food chains rarely include more than five organisms.

Is your knowledge about energy transfer to explain why (3 marks)

Energy lost

Respiration

Movement

Excretion

Undigested/uneaten

26

Both mayfly larvae and water fleas eat water boatmen.

Suggest how the population of mayfly larvae in the pond might change if the number of water fleas in the pond decreased. Explain your answer. (2 marks)

Mayfly larvae increase as more water boatmen available to eat

27

Describe the stage is used in producing a cloned mammal. (6 marks)

Nucleus from adult/donor mammal put into enucleated egg cell

Cell division/mitosis

Embryo transferred into the womb/ uterus of surrogate mother

mammal genetically identical to the adult/donor of original nucleus

28

Describe how nitrogen in the soil can be converted into plant protein. (3 marks)

Nitrates absorbed by roots

Active update

Amino acids

29

Explain what is meant by selective breeding and give two examples of its use (6 marks)

Organisms were desired characteristics chosen and crossed together

Look for characteristic in offspring

Breed from those offspring That have desired characteristic

Repeat over several generations

Examples: wheat
example character: stem length

Example: cattle
example character: Milk yeild