Tag: bio-chemistry

Questions Related to bio-chemistry

Read the following statements : 
a) $F _0$ part of ATPase is associated with breakdown of proton gradient.
b) A H - carrier contributes in creation of proton gradient.
c) Movement of electrons in ETS is coupled to pumping of protons into the lumen.
d) Formation of $NADPH + H^+$ is related with the creation of proton gradient.
How many of the above statements are correct ?

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

  1. Two

  2. One

  3. Four

  4. Three

Show answer
Correct Option: A

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. This leads us to which of the following as a probable hypothesis ?

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

  1. Disruption of one of these types of structure should necessarily disrupt each of the others as well.

  2. Loss of basal bodies should lead to loss of all cilia, flagella and centrioles

  3. Motor proteins such as dynein must have evolved before any of these four kinds of structure.

  4. Natural selection for motility must select for microtubular arrays in circular patterns.

Show answer
Correct Option: A,D

Which of the following is not required for chemiosmotic process?

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

  1. Proton gradient

  2. Spliting of water

  3. ATP synthase enzyme

  4. Closed membrane system

Show answer
Correct Option: D
Explanation:
A. Proton gradient is required because the breakdown of this gradient leads to release of energy.
B. Splitting of water is required which takes place on the inner side of the membrane and the protons that are produced, they accumulate within the lumen of the thyllakoids.
C. ATP synthase enzyme is required that allows diffusion of protons back across the membrane, this releases energy to activate ATPase enzyme which catalyses the formation of ATP.
D. Closed membrane system is not required. Only a membrane is required for the development of a proton gradient across the membrane of the thyllakoid and the proton accumulation is towards the inside of the membrane.
So, the correct answer is 'Closed membrane system'.

How many ATP molecule 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 useful chemical energy available in the high energy phosphate bond of one mole of ATP is $12\ kcal$.

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

  1. Fifty-seven

  2. One

  3. Two

  4. Thirty

Show answer
Correct Option: A

An example of structural protein is

bio-chemistry proteins muscle tissue structure of protein muscle tissues

  1. Myosin

  2. Collagen

  3. Keratin

  4. All of the above

Show answer
Correct Option: D
Explanation:

Structural proteins are fibrous proteins and form the largest class of proteins measured in terms of their total mass. Structural proteins include myosin, collagen, and keratin. 

Keratins form the protective covering like skin, hair, fur, wool, etc. in all land vertebrates. Equally widespread are the actin and myosin proteins of muscle tissue that play a major role in body movements. In addition, there are the collagens of tendons and hides, which form connective ligaments within the body.
Thus, the correct answer is option (D), 'All of the above'.

Which of the following cells play an important role in failure of transplanted organ?

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. $CD _4$ cells and $CD _8$ cells

  2. Natural killer cells

  3. Plasma cells

  4. Mast cells

Show answer
Correct Option: A

The possible blood groups of children born to parents having A and AB blood groups are?

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. O, A

  2. O, A, B

  3. A, B, AB

  4. O, A, B, AB

Show answer
Correct Option: A

Antibody common to blood group $O^-$ and individual with blood group $B^+$ is /are 

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. Anti -B

  2. Anti A

  3. Both Anti B and Anti A

  4. Anti -RH

Show answer
Correct Option: A

Blood groups were discovered by

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. Harvey

  2. Landsteiner

  3. Miller

  4. Lull.

Show answer
Correct Option: B

Persons with blood group A possess

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. Antigen A and antibodies b

  2. Antigen A and antibodies a

  3. No antigen but antibodies a and b

  4. Antigens A and B but no antibodies.

Show answer
Correct Option: A