1982514
Descripción
Test por Bella Statham, actualizado hace más de 1 año
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Creado por Bella Statham
hace más de 9 años
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Pregunta 1
Pregunta
Name the product of protein digestion.
Respuesta
-
Amino acid
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Protease
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Hydrochloric Acid
Pregunta 2
Pregunta
What is an allele?
Respuesta
-
A variation of a gene
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A type of gene
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A mutated cell
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Thick, jelly like substance in the nucleus
Pregunta 3
Pregunta
Select the process in the body that is NOT done by diffusion
Respuesta
-
Water absorption in the large intestine
-
Water loss from leaves/transpiration
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Glucose molecules absorbed
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Gas exchange - CO2 out, O2 in
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Moving particles (e.g mineral ions) against the concentration gradient
Pregunta 4
Pregunta
Pepsin is made by the stomach.
Name the acid made by the stomach that allows pepsin to work well.
Respuesta
-
Amino acid
-
Hydrochloric acid
-
Nitric acid
Pregunta 5
Pregunta
Which of the following is NOT a process done by diffusion?
Respuesta
-
Taking in substances for use in cell processes
-
Removing products of cell processes
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Carrying oxygen around the body
Pregunta 6
Pregunta
What type of enzyme digests dietary fats?
Respuesta
-
Lipase
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Protease
-
Amylase
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None of the above
Pregunta 7
Pregunta
Diffusion is the movements of molecules through a fully permeable membrane against the concentration gradient.
Respuesta
- True
- False
Pregunta 8
Pregunta
Name the process that makes lactic acid in an athlete's muscles.
Respuesta
-
Anaerobic respiration
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Aerobic respiration
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None of the above
Pregunta 9
Pregunta
In a hydroponic system (when farmers grow crops in greenhouses with no soil) an air pump and airstone makes bubbles of air in a solution of ions. Gases from the air will dissolve into the solution.
Explain how this helps keep the plant's root alive.
Respuesta
-
Supplies O2 which allows respiration meaning more energy for growth and active transport.
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Changes the volume of the solution to trick the plant into not transpiring (losing water)
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Changes the concentration to allow diffusion
Pregunta 10
Pregunta
Which type of enzyme digests protein?
Respuesta
-
Protease
-
Amylase
-
Lipase
Pregunta 11
Pregunta
Each molecule of chlorophyll contains a magnesium ion.
Why do plants need magnesium ions for healthy growth?
Respuesta
-
To make chlorophyll which traps light and energy for photosynthesis.
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To make chlorophyll which can be processed and made into glucose for the plant
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To make the sap vacuole inside plant cells.
Pregunta 12
Pregunta
Name one ion that plants take in to supply them with nitrogen.
Respuesta
-
Nitrate
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Air
-
CO2
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Minerals
Pregunta 13
Pregunta
Why is more lactic acid made in the muscles when running at 14 km per hour than when running at 8 km per hour?
Respuesta
-
More energy is needed and there is not enough O2 getting to cells so more anaerobic respiration.
-
The runner needs more energy so food is digested quicker, lactic acid is produced as a byproduct of this.
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More energy is needed but there is not enough O2 getting to cells so more aerobic respiration.
Pregunta 14
Pregunta
What is meant by a recessive allele?
Respuesta
-
Only expressed if dominant allele is not present.
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Only expressed if dominant allele is present.
-
Only expressived if there is one.
Pregunta 15
Pregunta
Fossils
Early life forms were soft-bodied.
Explain why this makes it difficult for scientists to be certain about what these early life forms were like
Respuesta
-
Fossils destryed due to soft parts decaying.
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No evidence.
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They were eaten, they rarely died of natural causes.
Pregunta 16
Pregunta
Plants need a supply of the element nitrogen to make substances.
Select the subsance that nitrogen does NOT make.
Respuesta
-
Protein
-
Amino acids
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Enzymes
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Glucose
Pregunta 17
Pregunta
Students did an experiment to find out where different types of seaweed live on a seashore. They used quadrats.
Which of the following would NOT improve their investigation to ensure they produced valid data?
SE
Respuesta
-
Repeating the experiment several times
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Placing the quadrat elsewhere along the shore
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Getting a larger quadrat
Pregunta 18
Pregunta
Which type of enzyme digests carbohydrates?
Respuesta
-
Protease
-
Amylase
-
Lipase
Pregunta 19
Pregunta
During IVF treatment, each fertilised egg cell forms an embryo by cell division.
What is this type of cell division?
Respuesta
-
Meisosis
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Mitosis
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Cloning
Pregunta 20
Pregunta
Genetic material is made up of large molecules of a chemical substance.
What is this chemical substance?
Respuesta
-
DNA
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Amino acid
-
Glucose
Pregunta 21
Pregunta
A bladder wrack (a type of seaweed) has many air bladders.
The air bladders help the bladder wrack to float upwards when the sea covers it.
Suggest how this helps the bladder wrack to survive.
Respuesta
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Means it is closer to the light, so more photosynthesis
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More minerals at the surface of the water for it to absorb
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There is less CO2 at the surface of the water, meaning more O2 for respiration
Pregunta 22
Pregunta
There are a number of reasons why organisms may not mate sucessfully.
Select the odd one out.
Respuesta
-
They are different sexes
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It is not mating season
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They do not find each other attractive
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They are juvenile
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