Biology Unit Two Quiz

This quiz will ask questions covering everything on the Biology Unit 2 GCSE AQA specification

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What is the function of a vacuole in a plant cell?
Gives shape to the plant
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What is the difference between the function of a cell membrane and the function of a cell wall?
The cell membrane controls what moves in/out of the cell, where as the cell wall gives a plant strength and protection
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Do animal cells have a cell wall?
No
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Where is the nucleus - which contains DNA - located in a bacterial cell?
A bacterial cell has no nucleus; the DNA is in the cytoplasm
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What is a yeast cell bud in a yeast cell?
It is a genetic copy of the original cell, which separates to form another yeast cell
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How is the root hair cell adapted to fullfil it's function of absorbing minerals?
It has a larger surface area
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Why do red blood cells contain no nucleus?
There is more space for haemoglobin
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Which four features mean a sperm cell is better adapted?
The acrosomal vesicle, the centriole, the flagellum and more mitochondria
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What is diffusion?
The movement of liquid and gas particles from an area of high concentration to an area of low concentration
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How does surface area affect diffusion?
The greater the surface area the faster diffusion occurs
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What else affects the rate of diffusion?
A greater difference between concentration and a decreased distance both make diffusion occur faster
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How is a constant diffusion gradient maintained in the lungs?
We are always breathing and blood always flows around the body
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Which is the correct statement?
Cells make up tissues. Tissues make up organs. Organs make up systems.
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What is the function of muscle tissue in the body?
To bring about movement by contracting
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What is the function of glandular tissue in the body?
To produce substances such as enzymes and hormones
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What is the function of epithelial tissue in the body?
To cover parts of the body
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What is the purpose of epidermal tissue in a plant?
To cover the plant and provide protection
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What is the purpose of mesophyll tissue in a plant?
To carry out photosynthesis
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What is the purpose of xylem and phloem tissue in a plant?
To transport substances around the plant
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What is the correct equation for photosynthesis?
6CO2 + 6H2O ------> C6H12O6 + 6O2
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What happens if the temperature is too high in photosynthesis?
The rate of photosynthesis decreases
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Why does a plant convert glucose produced in photosynthesis as starch?
It is insoluble so can be stored easier
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A plant can convert glucose into cellulose. What does the plant use cellulose for?
To strengthen the cell wall
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What else can a plant convert glucose into?
Oils/fats
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What is the start of the small intestine called?
The duodenum
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What is a substrate?
The substance being broken down
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Why can an enzyme only breakdown a specific substance?
Because the active site is unique for each substance
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What happens to an enzyme if it's in conditions above the optimum temperature?
They become denatured
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What does amylase breakdown?
Starch into glucose
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Like protease and amylase, where is lipase produced?
In the pancreas and small intestine
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What is the function of bile, which is produced in the liver?
To neutralise acid in the stomach
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Why is protease used in baby food?
It makes the food softer so babies can digest it easier
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Give an disadvantage of using enzymes in washing powder.
Expensive to produce
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How does our body change to respond to exercise?
Heart rate quickens and breathing quickens/deepens
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What is muscle fatigue?
The build up of lactic acid in muscles
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Which method produces gametes?
Meiosis
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Give one disadvantage of using stem cells.
Could lead to cloning humans
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What it the genotype for a boy?
XY
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What is a person called when they have different alleles in their genotype?
Hetrozygous
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If an adult with brown hair (BB) had intercourse with another adult with blonde hair (bb) what would the child's hair phenotype?
Brown
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Give an advantage of embryo screening.
Reduces the chance of a child having a poor quality life
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What are trace fossils?
Fossils made by an organism's footprint, burrow or root shapes
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Sometimes conditions change so quickly that many species die out at the same time. This is known as...
Mass extinction
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Give one cause of speciation.
Geographical separation
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Other cards in this set

Card 2

Front

What is the difference between the function of a cell membrane and the function of a cell wall?

Back

The cell membrane controls what moves in/out of the cell, where as the cell wall gives a plant strength and protection

Card 3

Front

Do animal cells have a cell wall?

Back

Preview of the front of card 3

Card 4

Front

Where is the nucleus - which contains DNA - located in a bacterial cell?

Back

Preview of the front of card 4

Card 5

Front

What is a yeast cell bud in a yeast cell?

Back

Preview of the front of card 5
View more cards

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harrypj03

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