Photosynthesis

Photosynthesis is the process whereby
1. plants make their own food using energy from the sun.
2. plants convert sunlight into energy.
3. food and minerals travel in a plant.
4. plants grow towards the sunlight.
Photosynthesis takes place in
1. most plants
2. all plants
3. plants and animals
4. animals only
Where in the plant does photosynthesis take place?
1. In the chloroplasts.
2. In cells of the roots.
3. In the nucleus.
4. In the vacuoles.
Photosynthesis helps to keep humans and other animals alive by providing
1. oxygen
2. carbon dioxide
3. nitrogen
4. water vapour
The green coloured pigment that is necessary for photosynthesis to take place is called
1. chlorophyll
2. phloem
3. cytoplasm
4. chloroplast
In addition to light energy from the sun, what two substances are needed in order for photosynthesis to take place?
1. Carbon dioxide and water
2. Carbon dioxide and oxygen
3. Water and glucose
4. Glucose and carbon dioxide
Apart from glucose, what other substance is produced during photosynthesis?
1. Oxygen
2. Water
3. Carbon dioxide
4. Chlorophyll
Which one of the following statements about photosynthesis is incorrect?
1. Carbon dioxide travels up from the soil through the roots of the plants.
2. Chlorophyll must be present in the leaves.
3. Sunlight is necessary for photosynthesis to occur.
4. Water travels up from the soil through the roots.
The products of photosynthesis are
1. glucose and oxygen
2. glucose and carbon dioxide
3. energy and glucose
4. energy and oxygen
Select two correct responses from the following:
1. Photosynthesis is important because without it we would not exist.
2. Photosynthesis reduces the amount of carbon dioxide in the atmosphere.
3. We get a tan from photosynthesis.
4. Chlorophyll is produced during photosynthesis.
Which one of the following word equations best describes the process of photosynthesis?
In an experiment a student has to de-starch the leaves of a plant. How is this done?
1. By placing the plant in darkness for more than 48 hours.
2. By placing the plant in direct sunlight for more than six hours.
3. By placing the leaves in boiling water for about two minutes.
4. By placing the leaves in warm alcohol for about ten minutes.
Which one of the following is used to test for the presence of starch in a leaf?
1. Iodine
2. Cobalt chloride
3. Litmus
4. Lime-water
During photosynthesis, how does carbon dioxide get into the plant?
1. Through stomata on the stem and leaves.
2. Through stomata located on the flower.
3. Underground through the roots.
4. Through the edges of the leaves.
The diagram shows a variegated leaf.
A test for starch was done on the leaf.
Where will the starch be found?
1. A only
2. B only
3. Parts A and B
4. No starch will be found
Tests are done on four leaves similar to those shown. Which leaf will give a negative result? (no starch found)?
1. W
2. Y
3. Z
4. X
In an experiment to test a green leaf for starch, the leaf is initially placed in boiling water. What is the purpose of this?
1. To kill the cells in the leaf.
2. To remove chlorophyll from the leaf.
3. To kill any bacteria on the surface of the leaf.
4. This test only works at a high temperature.
During an experiment to test a green leaf for starch, at one stage the leaf is soaked in warm alcohol for about 10 minutes.
What is the purpose of this?
1. To remove chlorophyll from the leaf.
2. To kill the cells in the leaf.
3. To kill any bacteria on the leaf.
4. This test only works when alcohol is present.
During an experiment to test a green leaf for starch, iodine solution is placed on the leaf with a dropper. If starch is present in the leaf, what colour change takes place?
1. The leaf turns blue/black.
2. The leaf turns brown.
3. The leaf turns red.
4. There is no change in colour.
In which one of the following plants does photosynthesis NOT take place?
1. Mushroom
2. Carrot
3. Cabbage
4. Daisy
Pondweed is a green plant that lives in water. In the presence of light pondweed undergoes photosynthesis and a gas is produced as one of the products. What is the gas produced?
1. Oxygen
2. Carbon dioxide
3. Water vapour
4. Nitrogen
Pondweed is a green plant that lives in water. In the presence of light pondweed undergoes photosynthesis.
The pondweed, and all green plants, take in and use a gas, from their environment during photosynthesis.
What is this gas?
1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Water vapour
In the experiment shown, bubbles of gas are seen to be formed when pondweed photosynthesises.
How may the rate of photosynthesis be increased?
1. By increasing the amount of light.
2. By cooling the water.
3. By adding acid to the water.
4. By adding more water.
The plant shown in the diagram was left in total darkness overnight and then exposed to strong sunlight for four hours.
The leaf with the foil was foil removed from the plant and tested for starch with iodine solution.
Which one of the following is most likely to happen?
1. The uncovered part of the leaf goes blue/black.
2. The covered part of the leaf goes blue/black.
3. All of the leaf goes blue/black.
4. None of the leaf goes blue/black.
The word equation describing photosynthesis is:
In this equation, what are X and Y?
1. X = light, Y = chlorophyll
2. X = heat, Y = chlorophyll
3. X = light, Y = heat
4. X = light, Y = lime-water
Farmers do not put their cows out in the field during winter because there is less grass growth.
Why does grass not grow in the winter?
1. There is less sunshine in the winter.
2. There is too much rain in the winter.
3. The temperature is too low in the winter.
4. The ground is too soft in the winter.
A group of pupils investigated the way in which the colour of light affects photosynthesis.
The pupils:
put a piece of pondweed into a test tube of water
shone light from a lamp with a red light bulb onto the pondweed
counted the bubbles of gas produced by the pondweed every minute for three minutes.
The pupils repeated their experiment using a blue light bulb, a green light bulb and a yellow light bulb.
What was the independent variable in the investigation?
1. The colour of the light bulbs.
2. The number of bubbles produced every minute.
3. The temperature of the water.
4. The distance from the bulb to the pondweed.
A group of pupils investigated the way in which the colour of light affects photosynthesis.
The pupils:
put a piece of pondweed into a test tube of water
shone light from a lamp with a red light bulb onto the pondweed
counted the bubbles of gas produced by the pondweed every minute for three minutes.
The pupils repeated their experiment using a blue light bulb, a green light bulb and a yellow light bulb.
A control is used in order to make the investigation fair.
Which one of the following could not be considered a control?
1. Repeat the experiment at the same time each day for four days.
2. Don't change the distance from the bulb to the test tube.
3. Use similar lamps with the same power output (Watts).
4. Use the same pondweed for each bulb.
A student investigated the effect of temperature on the rate of photosynthesis in pondweed.
The diagram shows the way the experiment was set up.
What two measurements would the student make to calculate the rate of photosynthesis?
1. Temperature of the water and the number of bubbles.
2. Temperature of the water and the number of leaves on the pondweed.
3. Volume of water and the number of bubbles.
4. Volume of water and the temperature of the water.
What is the function of photosynthetic tissue in plants?
1. Makes sugar by photosynthesis to feed the plant.
2. Transports food around the plant.
3. Transports water and minerals around the plant.
4. To convert stored food into energy needed for growth.
Plants can make food by photosynthesis. Another name for this food is
1. glucose
2. fructose
3. sucrose
4. lactose
Which one of the following statements concerning a green plant left outdoors is true?
1. It photosynthesises by day.
2. It photosynthesises by night.
3. It respires by night only.
4. It photosynthesises by night and respires by day.
What colour is usually associated with chlorophyll?
1. Green
2. Black
3. Yellow
4. Grey

Photosynthesis

Multiple Choice Quiz