Tag: plant respiration

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Questions Related to plant respiration

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Aerobic respiration occurs in

  1. Thylakoid.

  2. Golgi body.

  3. Grana.

  4. Mitochondria.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glycolysis takes place in the anaerobic condition in the cytosol of cytoplasm in all cells, Krebs cycle takes place in the aerobic condition in the mitochondrial matrix of eukaryotic cells.

So the correct option is 'Mitochondria.'

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

During aerobic respiration, acetyl CoA is synthesised in

  1. Cytosol.

  2. Mitochondrial matrix.

  3. Perichondrial space.

  4. Glyoxysomal matrix.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acetyl CoA is synthesized during oxidative decarboxylation of pyruvic acid and the reaction takes place in the mitochondrial matrix in which two molecules of NADH are produced and it enters the citric acid cycle.

So the correct option is 'Mitochondrial matrix'.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Pentose phosphate pathway, an alternative pathway of respiration was elucidated by

  1. Horecker

  2. Warburg and Dickens

  3. Blackman

  4. Kelvin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pentose phosphate pathway (PPP) or HMP shunt is a biochemical pathway parallel to glycolysis that generates NADPH (reduced energy) and pentoses. PPP was described by Warburg and Dickens. 

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Anaerobic respiration was first of all reported by 

  1. Maguenne

  2. Kostychev

  3. Klein

  4. Pfeffer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An anaerobic respiration a type of respiration in which an organism generates usable energy without the involvement of oxygen. So, in brief, it is respiration without oxygen. It was first reported by Kostychev.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Free radicals are formed through

  1. Oxidation

  2. Reduction

  3. Hydrolysis

  4. Synthesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A.Oxidation – Release of electrons and protons or reaction with oxygen

B.Reduction – Acceptance of electrons and protons or release of oxygen.

C. Hydrolysis – Breaking of molecules in presence of water.

D.Synthesis – Process of formation of biomolecules.

So, the correct option is ‘oxidation’.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

The energy-releasing process in which the substrate is oxidised without an external electron acceptor is called?

  1. Aerobic respiration

  2. Glycolysis

  3. Fermentation

  4. Photorespiration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fermentation is an anaerobic energy-releasing process where an organic substrate is oxidized without an external inorganic electron acceptor. In contrast, aerobic and anaerobic respiration use an electron transport chain.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Aerobic respiration of glucose produces energy _______________.

  1. $637K.Cal$
  2. $640K. Cal$
  3. $686K.cal$
  4. $693K.cal$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The complete aerobic oxidation of one mole of glucose releases approximately 686 kcal of energy under standard biological conditions. This is a standard biochemical constant taught in cellular respiration.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

In aerobic respiration, the ultimate or final electron acceptor is:

  1. Atomic oxygen

  2. Molecular oxygen
  3. Cytochrome $a _3$

  4. Water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In cellular respiration: NADH and FADH2 are converted to ATP through an electron transport chain with oxygen as the 'terminal electron acceptor'. Oxygen is the final electron acceptor. This is the only reason oxygen is required for living systems.

So, the correct option is 'Atomic oxygen'.

Multiple choice zoology respiratory system do plants breathe? plant respiration respiration-plants

Which of the following processes is not related to the pathway of respiration which occurs in both aerobic and anaerobic respiration?

  1. Dehydrogenation of triose phosphate

  2. Substrate level phosphorylation
  3. Reduction of coenzyme $NAD^+$

  4. Release of Carbon dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Substrate level phosphorylation provides quicker, less efficient, source of ATP, independent of external electron acceptors.This is only present in human erythrocytes which have no mitochondria and in oxygen depleted muscle.