Question

QUESTION 39

The molecule that traps the sun's energy is 


		ATP.
		chloroplast.
		chlorophyll.
		glyceraldehyde-3-phosphate

                  

QUESTION 42

Deleterious mutations increase the fitness of the organism.

True

False

QUESTION 47

The light-independent reactions of photosynthesis (Calvin cycle) take place in the 


		cytoplasm.
		grana.
		thylakoids.
		stroma.

QUESTION 48

Cellular respiration is endergonic.

True

False

QUESTION 49

The ATP and NADPH produced in the light-dependent reaction stage 


		are the end products of photosynthesis.
		become reactants for cellular respiration.
		are waste products that the plant eliminates.
		become the raw materials for the light-independent reaction stage.

QUESTION 52

In glycolysis, the net profit of ATP from one six-carbon sugar is 


		one.
		two.
		three.
		four.

2 points   

QUESTION 53

Aneuploidy is the addition or deletion of a chromosome.

True

False

Answer 1

Ans.

Q.39. Chlorophyll.

Explanation:

Plants trap light energy by absorbing sunlight with their green leaves. These green leaves are green due to presence of a green pigment that is chlorophyll. During photosynthesis, Chlorophyll ( mainly Chlorophyll a) absorbs light energy to produce sugars.

Q.42. False.

Explanation:

Deleterious mutation is a harmful mutation which decreases the fitness of an organism by increasing the susceptibility to a certain disease or disorder.

On the other hand, Beneficial mutations increase the fitness of an organism.

Q.47. Stroma.

Explanation :

Chloroplasts is divided into two parts i.e grana and stroma. Stroma region is clear and contains coloidial solutions and also contains all the enzymes which are  required for C3 cycle or Calvin cycle. So, the light Independent stage of photosynthesis occurs in stroma.

Q.48. False.

Explanation :

Cellular respiration is an exergonic process.As it releases energy (mainly in the form of ATP) and occurs spontaneously, it is an exergonic reaction, not an endergonic one.

  Q.49. become the raw materials for the light-independent reaction stage.

Explanation:

Light independent phase of photosynthesis is depend upon the end product ( ATP and NADPH ) of light dependent phase of photosynthesis.

This ATP and NADPH are used in many reactions step of Calvin cycle ( light independent phase ).

Q.52. two.

Explanation:

In glycolysis, total four ATP molecules are produced.

The steps are :

1,3- bisphosphoglyceric acid (2 mol )--------> 3-phosphoglyceric acid (2 mol) [in this step 2 mol of ATP is produced]

2- phosphoenol pyruvic acid (2 mol)--------> Pyruvic acid (2 mol) [in this step 2 mol of ATP is produced]

In glycolysis, there are two steps where two molecules of ATP become used up.

The steps are :

Glucose (1 mol) ----------> Glucose-6-phosphate (1 mol) [here 1 mol of ATP is used up]

Fructose-6- phosphate (1 mol) ---------> Fructose-1,6-bisphosphate (1 mol)

Hence, In glycolysis, the net profit of ATP from one six-carbon sugar is two.

Q.53.  True

Explanation:

Aneuploidy is the addition or loss of one or few chromosomes. It may be monosomy (2n -1), nullisomy (2n -2), trisomy (2n +1) and tetrasomy (2n +2).