Tag: biological oxidation

Quizzes (3) Questions (149)

Questions Related to biological oxidation

Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

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. $\displaystyle One$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

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 $H _{2}O$ yields $686\ kcal$ and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is $12\ kcal$?

  1. Two

  2. Thirty

  3. Fifty seven

  4. One
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

The primary reaction in photosynthesis is photochemical and takes place in the chloroplast. It is accomplished by a chain of electron carriers with phosphorylation of ADP to ATP. The actual site for this reaction is?

  1. Intrathylakoid space

  2. Thylakoid membrane

  3. Chloroplast envelope

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

The light-dependent reactions of photosynthesis, involving electron transport chains and photophosphorylation, take place across the thylakoid membrane where photosystems and ATP synthase complexes are embedded.

Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

The energy-carrying compound in the living cell is ATP.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ATP captures chemical energy obtained from the breakdown of food molecules and its hydrolysis (ATP to ADP + Pi or ADP to AMP + Pi) releases energy that can be used to drive various energy-requiring processes in cells. So, the correct option is 'True'.

Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

Choose the correct answers from the alternatives given .
Energy coupling of endergonic and exergonic reactions within cells

  1. Permits biological reactions to proceed at temperatures consistent with life

  2. Uses heat released by one reaction to fuel the other reaction

  3. Utilizes ATP to carry energy between the exergonic and endergonic reactions

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Energy coupling is the use of an exergonic process to carry out an endergonic process. The energy released in an exergonic process is used to develop an endergonic process. The ATP is responsible for mediating the energy coupling of cells, it is the energy currency. It is used to boost many cellular reactions that require energy. This also provides the energy required for reactions without too much increase in temperature. 
So, the correct option is 'All of the above'.
Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

Read the given statements and select the correct option. 
Statement 1 : In photosynthesis, during ATP synthesis, protons accumulate in the lumen of thylakoid.
Statement 2 : In respiration, during ATP synthesis, protons accumulate in the intermembrane space of mitochondria. 

  1. Both statement 1 and 2 are correct

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct

  4. Both statement 1 and 2 are incorrect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photolysishappens in the thylakoids, producing H+ ions inside the thylakoid membrane., a gradient of hydrogen ions will form across the membrane, ATP synthase take the advantage of this gradient, by allowing hydrogen ions to leak out of the membrane capturing their energy and phosphorylating ADP into ATP, while another statement is correct for mitochondria.

So, the correct option is 'Both statement 1 and 2 are correct'.

Multiple choice bio-chemistry biological oxidation chemiosmotic hypothesis living organisms and energy production mechanism of photosynthesis

Select the correct option:

Study the following statements regarding chemiosmotic hypothesis in mitochondria and select the correct ones.
(i) ${F} _{1}$ headpiece contains the site for the syntesis of ATP from ADP+Pi.
(ii) ${F} _{0}$ part forms the channel through which protons cross the inner membrane.
(iii) For each ATP produced, ${2H}^{+}$ pass through ${F} _{0}$ from the intermembrane space to the matrix down the electrochemical proton gradient.

  1. (i) and (ii)

  2. (ii) and (iii)

  3. (i) and (iii)

  4. (i),(ii) and (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  In the given question, the correct statements are as follows:

(i) F1 headpiece contains the site for the synthesis of ATP from ADP+Pi.

(ii) F0 part forms the channel through which protons cross the inner membrane.

(iii) For each ATP produced, 2H+ pass through F0 from the intermembrane space to the matrix down the electrochemical proton gradient.

So, the correct answer is '(i),(ii) and (iii)'.