Tag: living organisms and energy production

Questions Related to living organisms and energy production

ATP is known as energy currency of a cell. ATP is synthesized from ADP and Pi. The reaction is catalyzed by an enzyme called as ATP synthase. When the enzyme and substrate (ADP) are distant inside the cell, the reaction cannot take place spontaneously. Which of the following statements best explains the cause for the ATP synthase and ADP to interact?

  1. Electronegativity of ADP attracts ATP synthase

  2. ADP will be actively pumped to ATP synthase

  3. Random movements will bring ADP to ATP synthase

  4. ADP and ATP synthase always remain bound to oxysomes


Correct Option: A

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to $CO _2$ and $H _2O$ yields $686$kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is $12$kcal?

  1. $1$

  2. $2$

  3. $30$

  4. $57.1$


Correct Option: A

Calvin cycle has three stages.
$1$. Reduction during which carbohydrate is formed at the expense of photochemically made ATP and NaDPH.
$2$. Regeneration during which carbon dioxide acceptor $1, 5$-RuBP is formed.
$3$. Carboxylation during which $CO _2$ combines with $1, 5-$RuBP.
Identify the correct sequence.

  1. $3, 1, 2$

  2. $3, 2, 1$

  3. $1, 2, 3$

  4. $2, 1, 3$


Correct Option: A

A universal hydrogen acceptor in an electron transport system is ___________.

  1. ATP

  2. UDP

  3. NAD

  4. FMN


Correct Option: A

The idea that pH gradients could provide energy for ATP formation in chloroplasts and mitochondria was first proposed by ____________.

  1. Bassham

  2. Hill

  3. Mitchell

  4. Thompson


Correct Option: A

Which of the following step of photosynthesis is not directey involve in ATP synthesis or consumption?

  1. Corboxylation of dark Rection

  2. Reduction of dark reaction

  3. Cyclic photo phosphorylation of light reaction

  4. Regeneration of dark reaction


Correct Option: A

Direct gain of ATP from one mole of glucose during glycolysis or EMP pathaway ____________.

  1. 2 ATP

  2. 6 ATP

  3. 36 ATP

  4. 38 ATP


Correct Option: A

Photosynthetic oxygen producing cells differ from non-oxygen producing cells in that the former.

  1. Produce one ATP whereas the latter produce two

  2. Produce no NADPI-$1$ whereas the latter do

  3. Reduce ferredoxin whereas the latter do not

  4. Contain and use both photo systems I and II


Correct Option: A

Mitochondrial morphology is maintained by balancing the active absorption of water and active secretion by the mitochondrion. Hence mitochondria are likely to swell in the presence of.

  1. ATP

  2. Hypertonic solution

  3. Uncoupling agent

  4. Enzymes catalyst oxidative phosphorylation


Correct Option: A

How many ATP molecules could maximally be generated from on molecule of glucose, if the complete oxidation of one mole of glucose to $C{ O } _{ 2 }$ and $H _{ 2 }O$ yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?

  1. $\displaystyle Two$

  2. $\displaystyle Thirty$

  3. $\displaystyle Fifty \ seven$

  4. $\displaystyle One$


Correct Option: A