Biology Paper 1
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- Created by: annelister12
- Created on: 14-05-22 09:26
Suggest a reason for a decrease in number of deaths from malaria.(NOT nets)
Improved healthcare
1 of 31
In the pondweed experiment, suggest two ways the method could be improved so the results would be more valid.
1) Repeat and calculate mean
2) Control the distance of the bulb from the pondweed
2) Control the distance of the bulb from the pondweed
2 of 31
How is the volume of water lost from the leaves controlled?
By guard cells opening and closing the stomata
3 of 31
Explain in 3 points how diabetes can cause the body cells to lose more water.
Red blood cells become more concentrated
By osmosis the body cells' water will diffuse into blood
Through a partially permeable membrane
By osmosis the body cells' water will diffuse into blood
Through a partially permeable membrane
4 of 31
Name the type of cell that divides when a new body part grows.
Stem cells
5 of 31
What is an enzyme?(2)
Increases rate of reaction
Is a protein
Is a protein
6 of 31
Explain in 4 points how pancreatic cancer may cause a person to lose weight.
Pancreas produces fewer digestive enzymes
Fewer proteins will be able to be broken down
Hence fewer amino acids in the bloodstream
Which are used for growth and repair
Fewer proteins will be able to be broken down
Hence fewer amino acids in the bloodstream
Which are used for growth and repair
7 of 31
Explain in 3 points how the monoclonal antibody works to treat cancer.
Chemical dye is attached to the antibody
Targets one specific kind of cell
Antibodies will destroy only the cancer cells
Targets one specific kind of cell
Antibodies will destroy only the cancer cells
8 of 31
Outline the process of binary fission
DNA replicates
Cell grows(+ DNA moves to opposite ends of the cell)
Cytoplasm begins to divide and new cell membranes form
Cytoplasm divides and 2 new cells are made
Cell grows(+ DNA moves to opposite ends of the cell)
Cytoplasm begins to divide and new cell membranes form
Cytoplasm divides and 2 new cells are made
9 of 31
To investigate the effect of pH on enzyme activity, describe a practical.
Iodine in spotting tile
Heat water
1cm amylase + 1cm buffer in water bath
Add 5cm of starch
Mix and start a stopclock
Every 30 seconds, one drop into iodine
When iodine remains brown, no starch is present
Repeat with different pH values
Heat water
1cm amylase + 1cm buffer in water bath
Add 5cm of starch
Mix and start a stopclock
Every 30 seconds, one drop into iodine
When iodine remains brown, no starch is present
Repeat with different pH values
10 of 31
Describe how blood flows around the heart + body
Blood is oxygenated in lungs
Pulmonary vein to left atrium
Into left ventricle
To the aorta to the body
Oxygen transfers to body cells
Deox through vena cava
Into right atrium
Triscuspid valve allows it into right ventricle
Pulmonary artery to lungs
Pulmonary vein to left atrium
Into left ventricle
To the aorta to the body
Oxygen transfers to body cells
Deox through vena cava
Into right atrium
Triscuspid valve allows it into right ventricle
Pulmonary artery to lungs
11 of 31
How is a palisade cell adapted to its function?
Lots of chloroplasts
12 of 31
Give 5 adaptations of the small intestine and what they do
Long = increased SA
Villi(and microvilli)= increased SA
Thin walls = diffusion easier
Good blood supply = increased CG
Lots of mitochondria = increased energy
Villi(and microvilli)= increased SA
Thin walls = diffusion easier
Good blood supply = increased CG
Lots of mitochondria = increased energy
13 of 31
Give an + and - of Biological Heart Valve
+ Doesn't damage RBCs
- Valve hardens and needs replacing
- Valve hardens and needs replacing
14 of 31
What is the purpose + adaptations of capillaries?
Exchanges substances between blood and body cells
One cell thick for quick diffusion
One cell thick for quick diffusion
15 of 31
Give + and - of Artificial Heart
+ Keeps patient alive/ Not rejected
- Short life-time
- Short life-time
16 of 31
Where is the pacemaker found?
Right atrium
17 of 31
What happens in coronary heart disease?(2)
Build up of fatty material in coronary artery
Leads to clots and heart attacks
Leads to clots and heart attacks
18 of 31
Give a + and - of a Stent
+ Wire mesh, opens a blocked artery/Minor surgery
- Fatty material can rebuild
- Fatty material can rebuild
19 of 31
Give a + and - of a Mechanical Heart Valve
+ Lasts forever
- Damages RBCs
- Damages RBCs
20 of 31
Anaerobic respiration equation?
Yeast equation?
Yeast equation?
glucose > lactic acid
glucose > ethanol + CO2
glucose > ethanol + CO2
21 of 31
Give 2+ and 2- of Adult Stem Cells
+ Safe
+ Consent given to collect them
- Painful
- Risk of infection
+ Consent given to collect them
- Painful
- Risk of infection
22 of 31
Give 2+ and 2- of Embryonic Stem Cells
+Painless
+ Can differentiate into more types of cells
- 'Death of an embryo'
- Can't give consent
+ Can differentiate into more types of cells
- 'Death of an embryo'
- Can't give consent
23 of 31
Outline the process of mitosis
Cell grows and increases mitochondria
DNA replicates
Chromosomes are lined up and move to opposite ends of the cell
Membranes form around new nuclei
Cytoplasm divides fully
DNA replicates
Chromosomes are lined up and move to opposite ends of the cell
Membranes form around new nuclei
Cytoplasm divides fully
24 of 31
Describe RBCs in 4 points
Carries oxygen
Packed with haemoglobin
No nucleus
Biconcave shape(+SA)
Packed with haemoglobin
No nucleus
Biconcave shape(+SA)
25 of 31
Places amylase is made?
Pancreas
Salivary glands
Small intestine
Salivary glands
Small intestine
26 of 31
Places protease is made?
Pancreas
Stomach
Small intestine
Stomach
Small intestine
27 of 31
Places lipase is made?
Pancreas
Small intestine
Small intestine
28 of 31
5 uses of glucose in plants?
Cellulose
Respiration
Starch storage
Fat storage
Amino acids
Respiration
Starch storage
Fat storage
Amino acids
29 of 31
Outline potato mass practical
Identical chips
Different concentrations of solution
Measure the mass before
After 24 hours, dry them and measure
Calculate percentage change
Different concentrations of solution
Measure the mass before
After 24 hours, dry them and measure
Calculate percentage change
30 of 31
What could meristem tissue do to save a plant species?
Produce clones
31 of 31
Other cards in this set
Card 2
Front
In the pondweed experiment, suggest two ways the method could be improved so the results would be more valid.
Back
1) Repeat and calculate mean
2) Control the distance of the bulb from the pondweed
2) Control the distance of the bulb from the pondweed
Card 3
Front
How is the volume of water lost from the leaves controlled?
Back
Card 4
Front
Explain in 3 points how diabetes can cause the body cells to lose more water.
Back
Card 5
Front
Name the type of cell that divides when a new body part grows.
Back
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