Pregunta 1
Pregunta
Which of these are characteristics of an animal cell?
Respuesta
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Cell Wall
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Cell Membrane
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Cytoplasm
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Nucleus
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Mitochondria
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Vacuole
Pregunta 2
Pregunta
Which of these are characteristics of a bacterium cell?
Respuesta
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Plasmids
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Chlorophyll
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Chromosomal DNA
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Nucleus
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Flagellum
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Cell wall
Pregunta 3
Pregunta
What does a light microscope show?
Respuesta
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Inside of mitochondria
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Outside of Mitochondria
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Inside of chloroplasts
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Outside of Chloroplasts
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Nuclei
Pregunta 4
Pregunta
Which of these formulae are correct?
Pregunta 5
Pregunta
A stand of DNA has a...
Respuesta
-
triple helix structure.
-
double helix structure.
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single helix structure.
Pregunta 6
Pregunta
Which of these are the correct base pairs?
Respuesta
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Adenine-Thymine
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Cytosine-Guanine
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Guanine-Thymine
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Cytosine-Adenine
Pregunta 7
Pregunta
Base pairs are joined by...
Respuesta
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Weak hydrogen bonds
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Strong hydrogen bonds
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Weak hydrogen fibres
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Strong hydrogen fibres
Pregunta 8
Pregunta
Who discovered the double helix structure?
Respuesta
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Watson and Crick
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Franklin and Wilkins
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Watson and Wilkins
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Franklin and Crick
Pregunta 9
Pregunta
Watson and Crick used this idea and their knowledge of _________ to make a model of a DNA molecule.
Respuesta
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Base pairs
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Amino acids
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Proteins
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Genes
Pregunta 10
Pregunta
Proteins are made from...
Respuesta
-
amino acids
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hydrogen
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Chloroplasts
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Ribosomes
Pregunta 11
Respuesta
-
A single strand molecule and has the base uracil (U).
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A double helix structure.
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A single strand molecule and has the base adenine (A).
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A single strand molecule and has the base cytosine (C).
Pregunta 12
Pregunta
Which is the correct order of protein synthesis?
Respuesta
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DNA unzips, Transcription, mRNA joins a ribosome, amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein), translation.
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Translation, DNA unzips, transcription, mRNA joins ribosome, amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein).
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Amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein), translation, DNA unzips, transcription, mRNA joins ribosome.
Pregunta 13
Pregunta
Mutations can be...
Respuesta
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Harmful
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Beneficial
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Neutral
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All of these
Pregunta 14
Pregunta
What are enzymes? (Select two)
Respuesta
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Biological catalysts
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Proteins
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Organelles
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Cells
Pregunta 15
Pregunta
How do enzymes work?
Respuesta
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Finds it's specific substrate that fits the active sight, the 'lock and key' mechanism.
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Finds any substrate to react with
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Finds two or more substrates and makes them one
Pregunta 16
Pregunta
A higher temperature means...
Respuesta
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faster reactions.
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slower reactions.
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nothing.
Pregunta 17
Pregunta
If it is to hot the enzyme will...
Respuesta
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denature.
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denurture.
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disconnect.
Pregunta 18
Pregunta
What does denature mean?
Respuesta
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The enzyme alters in shape and breaks down other substrates than it usually would.
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The enzyme loses its shape and can't break down substrates.
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The enzyme loses its shape but continues to work.
Pregunta 19
Pregunta
What else denatures an enzyme (other than temperature)?
Pregunta 20
Pregunta
What else effects the rate of reaction of enzymes?
Pregunta 21
Pregunta
Which of the following are benefits of the Human Genome Project?
Respuesta
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Develops new and better medicines
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Improves forensic sciences
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Discrimination from employers/insurers
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Geneism
Pregunta 22
Pregunta
What are the benefits of genetic engineering? (select the answers with the correct examples)
Respuesta
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Reduce vitamin A deficiency (golden rice with beta carotene)
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Reduce vitamin A deficiency (with supplements)
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Producing human insulin (human farming)
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Producing human insulin (insulin-producing bacteria)
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Increasing crop yield (weather resistant crops)
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Increasing crop yield (herbicide resistant crops)
Pregunta 23
Pregunta
Which of the following show the correct method of genetic engineering?
Respuesta
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Useful gene cut out of chromosome using bacteria, bacterium used to cut open another chromosome, useful gene inserted into cut chromosome.
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Useful gene cut out of chromosome using enzymes, enzymes used to cut open another chromosome, useful gene inserted into cut chromosome.
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Useful gene cut out of chromosome using microscopic knife, microscopic knife used to cut open another chromosome, useful gene inserted into cut chromosome.
Pregunta 24
Pregunta
Controversy connected with genetic engineering?
Pregunta 25
Pregunta
What are human body cells?
Pregunta 26
Pregunta
Mitosis is for...
Respuesta
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sexual reproduction.
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asexual reproduction.
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growth and repair.
Pregunta 27
Pregunta
Which of the following is mitosis?
Pregunta 28
Pregunta 29
Pregunta 30
Pregunta
Which of the following is meiosis?
Pregunta 31
Pregunta
Cloning is an example of what?
Respuesta
-
Asexual reproduction
-
Sexual reproduction
Pregunta 32
Pregunta
This is the process of cloning mammals, what are the issues in doing so?
Respuesta
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Reduced gene pool (fewer alleles)
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Shortened lifespan
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Preserves endangers species
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Better understanding of ageing and age-related disorders
Pregunta 33
Pregunta
Cells in an embryo are...
Respuesta
-
differentiated.
-
undifferentiated.
Pregunta 34
Pregunta
Stem cells can turn into...
Pregunta 35
Pregunta
Positives of stem cell research?
Respuesta
-
Can be used to cure diseases (sickle cell anaemia)
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Can be specialised to replace damaged ones
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Embryos are potential lives so shouldn't be used.
Pregunta 36
Pregunta
Which is the correct equation for aerobic respiration?
Pregunta 37
Pregunta
What are the reactants in photosynthesis?
Respuesta
-
carbon dioxide
-
water
-
oxygen
-
glucose
Pregunta 38
Pregunta
What are the products of photosynthesis?
Respuesta
-
carbon dioxide
-
water
-
glucose
-
oxygen
Pregunta 39
Pregunta
What are the limiting factors of photosynthesis?
Respuesta
-
Light intensity
-
Water concentration
-
CO2 concentration
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Temperature
Pregunta 40
Pregunta
Which of the following adaptions help photosynthesis? (Some of these are written wrong)
Respuesta
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Broad leaves
-
Chlorophyll
-
Thick
-
Small surface area
Pregunta 41
Pregunta
The movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration.
What is this the description for?
Pregunta 42
Pregunta
Which part of a plant transports water and mineral from the roots to the rest of the plant?
Pregunta 43
Pregunta
Which part of a plant transports sugars from the leaves to growing and storing tissues?
Pregunta 44
Pregunta
What is transpiration? (Select two)
Respuesta
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The loss of water from a plant caused by evaporation and diffusion.
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The gain of water to a plant caused by osmosis and active transport.
-
The loss of water from a plant caused by diffusion only.
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The gain of water to a plant caused by osmosis only.