Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

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

Life without air would be

  1. Reductional

  2. Free from oxidative damage

  3. Impossible

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

Oxygen from air is the chief requirement for aerobic respiration to take place in the cells. However, in absence of air or oxygen, many organisms are capable to respire using anaerobic respiration. Life without air is considered anaerobic.

So the answer is 'anaerobic'.

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

Anaerobic respiration takes place in

  1. Ribosome

  2. Nucleus

  3. Vacuole

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

Anaerobic respiration takes place in the the cytoplasm of the cell, at a distance from mitochondria. After the glycolysis, pyruvate is further oxidised anaerobically producing energy which is much less than that produced aerobically.

So the answer is 'Cytoplasm'.

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’.