Respiration and photosynthesis Flashcards
What is the ultimate source of energy for green plants?
sun or sunlight energy
Plants’ leaves absorb energy from __________, which often comes from the Sun. What word completes the sentence?
light
What is the name of the process by which a plant transforms the energy from the Sun to stored energy in its leaves?
photosynthesis
What sugar is formed in photosynthesis?
glucose
What gas is needed by plants for photosynthesis?
carbon dioxide
What gas is produced by plants as a waste product of photosynthesis? Give the name, not the symbol or formula.
oxygen
Which essential substance for photosynthesis is absorbed from the soil?- glucose- carbon dioxide - water - oxygen
water
What substance is tested for to see if photosynthesis has occurred in a leaf?
Starch
The rate of photosynthesis is controlled by light intensity, availability of carbon dioxide and which other factor?
water
Plants store carbohydrates as starch. Name one other substance used for food storage in plants, especially in their seeds.
fats - lipids
ill in the missing word. In plants, __________ is used to strengthen the cell wall.
cellulose
In order to make proteins from glucose, what other substance do plant cells need?
nitrate
What substance produced in photosynthesis is used in plants to make fats and oils?
glucose
Fill in the missing word. In plant cells, food is stored in the form of starch, fat or __________.
oil
Plants use nitrate to make proteins. Where do they obtain this nitrate from?
soil
In order to make proteins, plant cells need nitrogen. They absorb nitrogen in the form of __________ ions from the soil. What one word completes the sentence?
nitrate
Look at the image below. The leaves of the unhealthy plant are yellow. What substance is missing from them but present in green leaves?
“chlorophyll”
Name the substance that is removed from the air by plants for photosynthesis. Give the full name, not the symbols.
carbon dioxide
Photosynthesis requires energy. What gives energy to a plant?
light
During the day in a greenhouse, it is warm and there is plenty of light, so the concentration of __________ __________ could be increased to boost the rate of photosynthesis. What two words complete the sentence?
carbon dioxide
On a sunny summer day, what factor is likely to limit the rate of photosynthesis in plants? Give the full name, not the symbols.
water or carbon dioxide
The rate of photosynthesis is controlled by temperature, availability of carbon dioxide and which other factor
light intensity
Some plant cells contain oil droplets which store __________. What word completes this sentence to describe the function of these droplets?
glucose
What product of photosynthesis is used to make starch?
glucose
The apparatus shown in the diagram can be used to measure the change in rate of photosynthesis in pondweed when the lamp is moved closer or further away from the pondweed. What would change to cause an increase or decrease in that rate?
light intensity
In a greenhouse, you can control the temperature, light intensity, or carbon dioxide level in order to make it the __________ factor in photosynthesis. What one word completes the sentence?
limiting
When plants respire, what gas is released into the atmosphere?
carbon dioxide
True of false? plants only respire at night
false
True or false? All living things respire all the time.
True
In which part of a cell does most aerobic respiration take place?
mitochondria
True or false? Respiration creates energy.
False
In the experiment below, yeast cells are producing ethanol by anaerobic respiration. What is produced in animal cells?
lactic acid
True or false? 60°C the time taken for the lime water to go cloudy is high because the enzymes in yeast have started to denature.
True
Name the process by which the ethanol is produced from sugarcane.
Fermentation
Name the micro-organism used to produce bread, beer and wine.
yeast
Complete the chemical equation for anaerobic respiration in yeast:
glucose → __________ + ethanol
carbon dioxide
What substance is removed from the air by living things for respiration?
oxygen
What process occurs in plants which would cause water to form on the side of the glass?
respiration
In aerobic respiration, glucose and oxygen are used up and carbon dioxide, water and __________ are released. What one word completes the sentence?
energy
Which gas is produced as a waste product of aerobic respiration? Give the name, not the symbol.
carbon dioxide
What are the missing two words? In aerobic respiration, glucose and oxygen are used up and __________ __________, water and energy are released.
carbon dioxide
Name the organism that is usually used to produce ethanol from plant material.
yeast
What is the name of respiration that occurs in the presence of oxygen?
aerobic
Name a type of food (not a drink) produced using yeast.
bread
Organisms need energy for chemical reactions to build larger molecules. They also need energy to move and to stay __________. What one word completes the sentence? (Hint: The answer is not “alive”)
warm
Does anaerobic respiration release more, less or the same amount of energy as aerobic respiration?
less
After anaerobic respiration, lactic acid is oxidised to form carbon dioxide and what other product?
water
Which word equation shows anaerobic respiration in muscles?
glucose → lactic acid + energy
The junction between two neurones is called a __________. What one word completes the sentence?
synaps
What substances control all the chemical reactions in a cell?
enzymes
What happens to the heart rate during exercise
increases
During exercise, does the heart rate increase or decrease?
increase
Name one of the substances that the blood supplies to the muscles during exercise
glucose or oxygen
True or false? During exercise, an increase in breathing rate causes an increase in heart rate.
false
During exercise, does the breathing rate increase or decrease?
increase
