Tag: bio-chemistry

Questions Related to bio-chemistry

For the redox reaction:


          $Zn+N{ O }^- _3\rightarrow Zn^{2+}+NH^+ _4$ 

in a basic medium, coefficients of $Zn, \ NO^- _3$ and $OH^-$ in the balanced equation respectively are:

bio-chemistry biological oxidation classical idea of redox reactions oxidation reduction redox reaction

  1. $4, 1, 7$

  2. $7, 4, 1$

  3. $4, 1, 10$

  4. $1, 4, 10$

Show answer
Correct Option: C

The mass of $H _{2}O _{2}$ that is completely oxidised by $30.2\ g$ of $KMnO _{4}$ (molar mass= $158\ g mol^{-1}$) in acidic medium is 

bio-chemistry biological oxidation classical idea of redox reactions oxidation reduction redox reaction

  1. $12\ g$

  2. $14\ g$

  3. $16\ g$

  4. $1\ g$

Show answer
Correct Option: C

Which of the following is a non - redox process ?

bio-chemistry biological oxidation classical idea of redox reactions oxidation reduction redox reaction

  1. $ SO _{4}^{2-}\rightarrow SO _{3} $

  2. $ Cr _{2}O _{7}^{2-}\rightarrow CrO _{4}^{2-} $

  3. $ PO _{4}^{3-}\rightarrow P _{2}O _{7}^{4-} $

  4. $ C _{2}O _{4}^{-2}\rightarrow CO _{2} $

Show answer
Correct Option: A,B,C
Explanation:

In Redox reaction oxidation state changes  


(a) In $ SO _{4}^{-2}, $ Its $ S^{+6} $
In $ SO _{3}, $ Its $ S^{+6}$
$ \therefore$ In $SO _{4}^{-2}\rightarrow SO _{3},$ there is no change 
in oxidation state of $ O^{+5}$
$ \therefore $ Non- redox reaction 

(b) In $ Cr _{2}O _{7}^{-2} $
Lets oxidation state of Cr be x 
$ \therefore 2(x)+7(-2) = -2 $
$ \therefore 2x+(-14) = -2 $
$ \therefore 2x = 12 $
$ \therefore x = 16 $

In $ CrO _{4}^{-2} $ 

Let oxidation Sate of Cr be y
$ y+4(-2) = -2 $
$ y-8 = -2 $
$ y = +6 $
$ \therefore $ oxidation of Cr remain same 
$ \therefore $ Non- redox Readtion

(C) In $ PO _{4}^{-3}, $ Its $ P^{+} $
and In $ P _{2}O _{7}^{-4} $
Let oxidation sate of P be x 
$ 2x+7(-2) = -4 $
$ 2x-14 = -4 $
$ \therefore 2x = 10 $  $ \therefore $ Non - redox Reaction 
$ \therefore x = 5 $

(d) In $ C _{2}O _{4}^{-2},$ Its $ C^{+3}$
In $ Co _{2},$ Its $ C^{+4} $  $ \therefore $ Redox reaction 

Hence, the correct options are $\text{A}$, $\text{B}$ and $\text {C}$

Water we take in, plays an important role in?

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Metabolic processes

  2. Provide energy

  3. Prevents dehydration

  4. More than one correct answer

Show answer
Correct Option: A

Which of the following represents the metabolic anti-transparent?

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. PMA

  2. $CO _2$

  3. Aspirin

  4. All of the above

Show answer
Correct Option: A

Which of the following life processes is evolved around RNA?

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Metabolism

  2. Translation

  3. Splicing

  4. All of these

Show answer
Correct Option: D

Respiration is a

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Anabolic process

  2. Deamination process

  3. Catabolic process

  4. Both A and C

Show answer
Correct Option: D
Explanation:

The breaking of the C-C bonds of complex compounds through oxidation within the cells, leading to the release of a considerable amount of energy is called as respiration. As carbon-carbon covalent bonds are broken, it is a catabolic process. Respiration involves the synthesis of energy in form of ATP. The synthesis of ATP leads to the formation of several covalent linkages of phosphates. There is synthesis which are included in the anabolic processes.

Thus, the correct answer is option D.

Catabolic and anabolic pathways are often coupled in cell because

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Both the paths have the same energy

  2. The free energy released from one pathway is used to drive other

  3. The intermediates of a catabolic pathway are used in the anabolic pathway

  4. Their enzymes are controlled by their activators and inhibitors.

Show answer
Correct Option: B
Explanation:
  • Anabolic pathways are those that require energy to synthesize larger molecules. Catabolic pathways are those that generate energy by breaking down larger molecules. Both types of pathways are required for maintaining the cell's energy balance.
  • Catabolic and anabolic pathway are coupled because catabolic reactions furnish the energy required for anabolism. Catabolic reactions transfer energy from complex molecules to ATP. Anabolic reactions transfer energy from ATP to complex molecules.
  • Hence Catabolic and anabolic pathways are often coupled in the cell because the free energy released from one pathway is used to drive other.
  • So, the correct answer is 'the free energy released from one pathway is used to drive other'.

Muscle tissue growth : anabolic process : : .......... : catabolic process.

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Digestion

  2. Secretion

  3. Regulation

  4. All of the above

Show answer
Correct Option: A
Explanation:

Muscle tissue growth is an anabolic process. There is respiration reactions carried out in the muscles which provide energy in the form of ATP. This liberated energy helps the muscles to relax and contract. Thus, the muscles tissue show growth due to anabolic process. 

The process of digestion is considered as the catabolic process. There is break down of the complex food into simpler compounds. These simpler molecules can be easily absorbed by the cells of the body. 
Thus, the correct answer is option A. 

Conversion of polysaccharide to monosaccharide is known as

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Anabolic reaction

  2. Catabolic reaction

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:

The catabolic processes are the reactions in which the large complex molecules are broken down to produce smaller organic molecules. The polysaccharide which is a complex molecule is broken down to from many small monosaccharide molecules. For example, glycogen is broken down to produce glucose molecules. 

Thus, the correct answer is option B.