Which of the following is an example of “molecule”?

Related Mcqs:

1. In Urea cycle __________ ammonia molecules combine with 1 CO2 molecule to form 1 molecule of urea.

   A. 1
   B. 2
   C. 3
   D. 4

2. Which of the following statement about the head of a chlorophyll molecule is incorrect?

   A. It is a porphyrin ring or tetrapyrrole ring structure
   B. It is flat, square and light absorbing
   C. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.
   D. It is hydrophobic

3. Complete breakdown of glucose molecule takes place in which of the following?

   A. Alcoholic fermentation
   B. Lactic acid fermentation
   C. Aerobic respiration
   D. All of these

4. Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.

   A. Binding sites of actin get attached to the myosin head.
   B. Troponin uncovers the actin binding sites.
   C. Tropomyosin gets removed from the binding sites of actin filaments.
   D. Ca2+ goes back inside sarcoplasmic reticulum.

5. Which one of them is a micro-molecule?

   A. Polysaccharide
   B. Protein
   C. Hemoglobin
   D. ATP

6. Chlorophyll molecule contrains __________ as central metal ion.

   A. Fe2+
   B. Mg2+
   C. Zn2+
   D. Cu2+

7. Excessive increase in temperature of medium causes the enzyme molecule to____________?

   A. Activate
   B. Unaffected
   C. Denatured
   D. None of these

8. Total number of amino acids in a hemoglobin molecule are__________?

   A. 554
   B. 564
   C. 574
   D. 584

9. ATP is a an important molecule for its major function___________?

   A. As an energy currency of the cell
   B. As a coenzyme
   C. Both a and b
   D. None of these

10. PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ?

    A. 600
    B. 650
    C. 680
    D. 700