Tag: biology

Questions Related to biology

The optimum temperature for respiration is 

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. 20 -30$^o$C

  2. 25 -60$^o$C

  3. 40 -50$^o$C

  4. 10 -30$^o$C

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Correct Option: A
Explanation:

Respiration is the breakdown of the carbon-carbon bond to release energy.

This process is done with the help of a variety of different enzyme and as we know that the enzyme works efficiently in a narrow range of temperature.
The optimum temperature range for respiration is 20- 30-degree Celsius in which the enzyme work efficiently and the respiration is carried out.
So, the correct option is ' 20-30°C'

The potato growing in hilly areas is bigger in size due to

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. High rate of photosynthesis at high altitude.

  2. Low rate of respiration at high altitude.

  3. Due to formation of more fat.

  4. None of the above.

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Correct Option: B

The raw materials needed for respiration are

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Glucose and $O _2$.

  2. Glucose and $CO _2$.

  3. Glucose and carbon.

  4. Glucose and sucrose.

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Correct Option: A
Explanation:

Respiration is a process in which glucose is oxidised to release carbon dioxide, water and energy in the presence or absence of oxygen by a multistep reaction.

So, the correct answer is 'Glucose and O$ _2$'.

Respiration results in

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Increase in weight

  2. Decreases in weight

  3. No change in weight

  4. None of these

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Correct Option: B
Explanation:

Respiration result in a decrease in dry weight. During respiration when we breathe, oxygen enter in the body of an organism. Due to the presence of oxygen, the breakdown of glucose into pyruvate and other products takes place. At last, carbon dioxide, as well as some energy, are also released out from the body through the process of exhalation.

So, the correct answer is 'decrease in weight'.

Consider the following statements w.r.t. respiration 
a. Cyt-b is a mobile electron carrier
b. $CO _2$ is end product of all types of respiration
c. Five atoms of oxygen are required for complete oxidation of one molecule of pyruvate
d. Conversion of succinate to fumarate produces a reduced coenzyme.

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. a & c are incorrect

  2. Only d is correct

  3. a & d are correct

  4. b & d are correct

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Correct Option: A
Explanation:

Cyt-b is part of ETS which act as an electron carrier and formation of ATP whereas CO$ _2$ is the only end product of anaerobic respiration. conversion from succinate to fumarate produces a reduced coenzyme known as succinate dehydrogenase (SDH) or succinate-coenzyme Q reductase (SQR).

So the correct option is 'a & c are incorrect'

The rate of respiration of young maturing seeds is quite high but as water contents decreases during further maturation respiration

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Remains high

  2. Stop complete

  3. Increase steadily

  4. Decrease steadily

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Correct Option: D
Explanation:

The rate of respiration of young maturing seeds is quite high which has amount of water as the limiting factor during maturation. Water helps in the acceleration of enzyme activity. When the amount of water is less, the rate of maturation decreases.

The increases respiration rate due specifically to anion uptake is called _______________.

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Salt respiration

  2. Active absorption

  3. Exchange absorption

  4. Ground respiration

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Correct Option: A

Which of the following is necessary for respiration in plants?

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Carbon dioxide

  2. Oxygen

  3. Chlorophyll

  4. Light

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Correct Option: B
Explanation:

Oxygen is the final electron electron acceptor in the electron transport chain, which occurs in the mitochondria. So, for aerobic respiration oxygen is must. Respiration decreases with decreased available oxygen. Under circumstances where no oxygen is present, like in poorly draining soil, anaerobic respiration (fermentation) occurs.

If the naked pea seeds are kept in four respiratory flasks, they would germinate best in the flask which contains

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Carbon dioxide

  2. Oxygen

  3. Hydrogen

  4. Nitrogen

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Correct Option: B
Explanation:
Germination is a process of sprouting of seeds which later develops into a new plant. There are several factors which play vital role in the germination process. Theses are water, temperature, oxygen and light. During the process of germination, initially, the seed absorbs water. Later, the swollen seed respires that requires oxygen. Hence, when naked pea seeds are kept in a flask containing oxygen, it shows the best germination. 
Thus, the correct answer is option B.
Identify the correct terms for the given statements and select the correct answer.

(i) Sudden increase in the rate of respiration during ripening of fruits.
(ii) Reduction in the consumption of respiratory substrate when mode of respiration is changed from anaerobic to aerobic
(iii) Respiratory oxidation of carbohydrates and fats.

factors affecting respiration living organisms and energy production life processes in living organisms- part 1 respiration biology

  1. Pasteur effect- (i) ; Floating respiration -(ii) ; Climacteric respiration- (iii)

  2. Pasteur effect- (ii) ; Floating respiration -(iii) ; Climacteric respiration- (i)

  3. Pasteur effect- (iii) ; Floating respiration -(ii) ; Climacteric respiration- (i)

  4. Pasteur effect- (ii) ; Floating respiration -(i) ; Climacteric respiration- (iii)

Show answer
Correct Option: B