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Flashcards in Paper 6 Deck (27):
1

Complete the table

Type of organism: Example: Multicellular:
Plants
Animals
Bacteria
Viruses

Type of organism: Example: Multicellular:
Plants. Maize. Yes
Animals. Human. Yes
Bacteria. Lactobacillus No
Viruses. Influenza. No

2

In an area of rain forest, there were plans to cut down lots of trees to build a new Road. Some people did not want this to happen, but some people did.

Suggest two reasons why some people wanted the roads to be built

Access/transport/travel/communication

Cut down trees that could be used

Farming/mining

3

Describe two biological effects that may occur as a result of deforestation

Loss of habitat/food
Lots of numbers/death/extinction/migration

Less photosynthesis

More CO2 in air so increasing global warming/greenhouse effect

Soil erosion/leaching/ flooding

Less transpiration/less rainfall

4

Name the part of a flower that produces pollen

Anther

5

Explain what is meant by the term pollination (2 marks)

Pollen
From another to stigma

6

The stem and leaves of plants grow upwards. Name one stimulus that makes them grow upwards

Light

7

State the word equation for photosynthesis

Glucose + oxygen --> carbon dioxide + water

8

Describe how the structure of the leaf is adapted to help obtain the gas required for photosynthesis (2 marks)

Thin
Large surface area
Stomata
Air spaces

9

Name the hormone responsible for the change in heartrate during exercise

Adrenaline

10

Name one system in the body, other than the circulatory system, that is affected by smoking

Respiratory/nervous

11

John ate some rice. The rice contains starch.

Describe how starch is broken down in the digestive system. (6 marks)

Mouth/the saliva

Mechanical digestions new/chewing/mastication

Amylase

Starch to maltose

Pancreas/pancreatic juice/small intestine

Maltose to glucose

12

Give two reasons why micropropagation (tissue culture) is a useful technique to use after a selective breeding program.

large numbers produced

quickly produced

Identical/all have desired characteristic/cloned

13

Suggest why the growth of crops is better in liquid fertiliser than it is in soil

All the/extra mineral ions

14

Which neurone passes impulses from a receptor to the central nervous system

Sensory

15

Which neurone is found only in the central nervous system?

Relay

16

Complete the table

Hormone:endocrine gland: target organ: effect:
Adrenaline

Oestrogen

Hormone:endocrine gland: target organ: effect:
Adrenaline adrenal Heart Inc. rate

Oestrogen. Ovary. Uterus. Rep. Lining

17

State the word equation for anaerobic respiration in yeast cells

Glucose + carbon dioxide --> ethanol

18

Describe the steps that would be taken to produce genetically modified yeast cells (4 marks)

Gene/DNA cuts

Restriction enzyme

Plasmid/vector

Ligase

The gene/DNA into yeast

19

Suggest how genetically modified yeast cells could produce beer that is low in Carbohydrate (2 marks)

Enzyme That digests starch/turns starch to sugar

20

The table below list and processes. Complete the table

Process. Description:
Decomposition

Transpiration

Nitrification

Vasodilation

Process.
Decomposition: Bacteria/microorganisms breakdown/digest dead organisms

Transpiration: evaporation/diffusion/loss of water from a leaf/plant

Nitrification: bacteria changes ammonia to nitrate

Vasodilation: widening of blood vessels/arteries

21

Suggest why fish need lipids

Energy/insulation

22

Suggest why fish need vitamin D

Bones/teeth/skeleton

23

Excreted waste from fish must be removed from the ponds. It is allowed to escape into rivers it might cause pollution.

Describe and explain the events that might occur as a result of this pollution. (5 marks)

Nitrate

Growth of plants/algal bloom/eutrophication

Light blocked/less photosynthesis

death of organisms/bacteria/microorganisms

Oxygen depletion

24

When a person has heart disease, the blood vessels supplying the heart muscle become narrower and may get totally blocked. Suggest how this might happen and describe how it would change the respiration of heart muscle cells, leading to their deaths. (5 marks)

Pulmonary artery

Fat/cholesterol blocks/deposits

Aerobic to anaerobic respiration

less oxygen

Less glucose

Less respiration/less energy

Buildup of lactic acid

25

Give three ways in which ultrafiltration differs from selective reabsorption

Different location

Different pressure used

No energy required

Molecules out of blood/into nephron

Depends on molecule size

Hormones not involved

26

Damage to the pituitary gland can prevent the secretion of the hormone ADH.

Explain how this affects Osmoregulation by the kidney. (4 marks)

Less water reabsorbs

Collecting duct

Permeability

More/ lots of water/more water in urine

Dehydration /blood concentration increase

27

The insulin travels to the heart in a blood vessel called the……., The largest vein in the body. Blood enters a chamber called the right….., and passes to the right ventricle before being pumped into the pulmonary artery to the…….Back flow of blood is prevented by atrioventricular and semilunar…….The blood containing insulin returns to the heart in the pulmonary vein. It then leaves the heart indeed….., the largest artery in the body. Finally, the insulin is taken into the liver by the…… Artery. When insulin reaches the liver cells it causes the conversion of…….Into an indissoluble carbohydrate carbohydrate called……

Vena cava
Atrium/auricle
Lung
Valves
Aorta
Hepatic
Glucose/sugar
Glycogen