Question

QUESTION 19

1. Light dependent reactions are carried out both on and in between photosystems. This process is like the last stage of aerobic respiration in that both

   		reaction sequences carry out electron transfer phosphorylations.
   		processes generate ATP.
   		processes involve electron flow.
   		systems are lodged along and within a membrane surface.
   		all of the above.

3.2 points   

QUESTION 20

1. Each wavelength of light has its own

   		temperature.
   		separate source where it’s generated.
   		energy level.
   		molecular structure.
   		interference pattern.

3.2 points   

QUESTION 21

1. ________ organisms build their own energy-rich molecules using solar energy.

   		Micro-
   		Autotrophic
   		Tropical
   		Multicellular
   		Marine

3.2 points   

QUESTION 22

1. Energy supplied to break bonds in reactant molecules is known as

   		electrical potential.
   		action potential.
   		supplemental energy.
   		activation energy.
   		feedback inhibition.

3.2 points   

QUESTION 23

1. Accessory pigments enable the chloroplast to

   		absorb and thus use a wider range of wavelengths of light.
   		carry out both photosynthesis and respiration.
   		store light energy for use during the night.
   		continue functioning when only non-visible wavelengths are available.
   		attract a different set of insects to the plant in the fall season.

3.2 points   

QUESTION 24

1. In respiration, chemical energy is transferred from glucose to ATP. The energy transfer however, is not 100% efficient. In the transfer, some of the energy is lost as

   		carbon dioxide.
   		heat.
   		pyruvate.
   		light.
   		ADP.

3.2 points   

QUESTION 25

1. In a crowded, unventilated room, the temperature rises because

   		people’s cells burn glucose inefficiently giving off heat.
   		people in crowded rooms tend to talk more.
   		the carbon dioxide people exhale is loaded with potential energy.
   		people’s respiration process consumes most of the available energy.
   		people consume oxygen leaving behind smaller molecules that move faster.

Answer 1

19. All of above

Photosynthesis in the process of formation of sugar using atmospheric carbon dioxide and water whereas respiration is the process of breakdown of Sugars using atmospheric oxygen. The options given in the question list the similarities occurring in the last stage of photosynthesis and respiration. Both of them takeover electron transport chain. It occurs in thylakoid membrane during photosynthesis and inner mitochondrial membrane during respiration.

20. Energy level

Every radiation has its own wavelength and because of this day have its own energy level. This is because energy is dependent upon wavelength.

E = hc/

21. Autotrophic

Autotrophic organisms are those which can prepare their own food. The process by which we can prepare their own food is called as photosynthesis. It is carried out in the presence of chlorophyll and sunlight and requires atmospheric carbon dioxide and water to make sugar and evolve oxygen.

22. ​​​​​Activation energy

All the enzymes are protein molecules which help to to speed up the rate of a biological reaction. They do so by lowering the activation energy. Activation energy is the amount of energy required to start a biological reaction.

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