WorksheetsRespiration [Cellular] - Qn Bank
Total questions: 19
Worksheet time: 17mins
What is the purpose of respiration?
Release energy stored by plants in food molecules
Regulates oxygen available in the body
Release energy in the presence of oxygen
Allows the body to take in oxygen and remove carbon dioxide
Respiration is the...
Oxidation of food molecules w/ energy release in living cells
Process by which air moves in and out of the lungs
Process by which oxygen is absorbed by the blood through the alveoli
______ respiration occurs in the presence of O2, while ______ respiration occurs in the absence of O2. (separate answers with a comma)
(a)
How do(es) the substrate(s) of aerobic respiration differ from anaerobic?
No difference, both only need glucose
Aerobic respiration has oxygen but anaerobic does not
Aerobic respiration has oxygen and glucose but anaerobic does not
What is a substrate?
Both types of respiration release CO2 as a waste product. What is the other waste product?
Aerobic: water, anaerobic: ethanol
Aerobic: ethanol, anaerobic: water
Both release ethanol
Both release water
Complex organisms mainly use which type of respiration and why?
Aerobic; they require large amounts of energy for processes e.g. muscular contraction
Anaerobic; they require large amounts of energy for processes e.g. cell division
Aerobic; they can survive on small amounts of energy
Anaerobic; they can survive on small amounts of energy
The alcohol in beer is produced by _______ through the process of ________.
yeast, alcoholic fermentation
yeast, aerobic respiration
microorganisms, aerobic fermentation
Glucose and ethanol are C6H12O6 and C2H6O respectively. Does ethanol contain energy?
Yes, it can be further broken down
No, it cannot be further broken down
No, it is an end product
Which tissue(s)/ organ(s) in the human body is/are able to perform anaerobic respiration?
Muscle
Brain
Heart
Liver
Muscle cells switch to ________ respiration during vigorous activity, because ________.
Anaerobic, oxygen is depleted but the cells must still release energy
Aerobic, they require a lot of energy during such activity
Anaerobic, the cells run out of glucose to break down
Check all that apply. Respiration...
Releases energy
Breaks down food molecules
Occurs all the time
Always requires oxygen
Select best option. Oxygen debt is...
Amount of O2 required to oxidise lactic acid produced during anaerobic respiration
Amount of O2 required to oxidise ethanol produced during anaerobic respiration
Amount of O2 that must be accumulated in muscles for storage
Energy produced from respiration is... (check all that apply)
Used to synthesise proteins
Used in muscular contractions
Lost into the atmosphere
Released as heat to stay warm
What causes us to feel tired after vigorous exercise?
Lactic acid accumulation
CO2 accumulation
Dehydration
Lack of glucose
Why do you continue to breathe heavily after vigorous exercise? [2]
O2 is needed to break down lactic acid
O2 is needed for aerobic respiration
Excess CO2 must be removed from the blood
Rate of respiration in muscle cells decreased during exercise
Indicator solution is red and turns yellow at low pH. Why did the pH decrease the most in the leftmost tube? [2]
Worms released CO2 in aerobic respiration
Worms released lactic acid in anaerobic respiration
CO2 dissolves to form an acid
Lactic acid has a low pH
The O2 concentration decreased
Indicator solution is red and turns yellow at low pH. Why is the middle tube not as acidic as the leftmost? [2]
CO2 released by worms was taken up by plants for photosynthesis
CO2 released by worms was taken up by plants for respiration
Less CO2 dissolves to form an acid
More CO2 dissolves to form an acid
This experiment measures rate of respiration in seeds. Why are the seeds in a vacuum flask?
To retain the small amount of heat released by respiration
To keep the seeds warm and speed up germination
Prevents room temperature from affecting the results
Prevents light reaching the seeds
This experiment measures rate of respiration in seeds. Why is there cotton wool in the mouth of the vacuum flask?
Allow oxygen into the flask
Prevent a build up of pressure
Allow the seeds to be watered
Provide something for the seeds to grow roots into
