FREE NEET Biology Practice MCQ Test: Respiration In Plants Exercise 2 Questions Answers With Detailed Explanations [PDF]

Answer: (c)

During anaerobic respiration, due to the absence of $O_{2}$ the value of R.Q. is infinite (or more than one).

Answer: (c)

Specialized epidermal cells surrounding the guard cells are known as Subsidiary or accessory cell.

Answer: (a)

Glucose is the chief respiratory substrate which yields maximum number of ATP molecules. Glucose is the most common substrate in glycolysis. Any other carbohydrate is first converted into glucose. During glycolysis it changes to pyruvic acid and net gain is of 2 ATP and 2 $NADH_2$ molecules. And later on during Krebs' cycle 30 molecules of ATP are produced. So a total of 38 ATP molecules are produced from 1 mol of glucose during aerobic respiration.

Answer: (c)

ETS (Electron transport system or chain) is a series of coenzymes and coenzymes that takes part in the passage of electrons from a chemical to its ultimate acceptor. ETS is present in the inner mitochondrial membrane, oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of $FADH_{2}$ produces 2 molecules of ATP. In respiration, energy of oxidation-reduction is utilized for the production of proton gradient.

Answer: (c)

Answer: (d)

Answer: (a)

Answer: (a)

ATP is adenosine triphosphate. It was discovered by Lohmann in 1929. It consists of a purine, adenine, a pentose sugar (ribose) and a row of three phosphates out of which the last two are attached by high energy bonds. The last phosphate bond yields an energy equivalent of 7 kcal.

Answer: (b)

Glycolysis occurs in cytoplasm as all necessary enzymes are found in it. This process is common in aerobic/anaerobic respiration. In this process, one glucose molecule is converted into two moles of pyruvic acid.

Answer: (b)

Answer: (c)

Answer: (b)

Answer: (c)

Answer: (c)

Answer: (b)

During respiratory chain, complete degradation of one glucose molecule produced 38 ATP molecules. NAD and FAD is reduced to NADH/$FADH_2$.

Answer: (c)

Answer: (c)

Answer: (c)

12 kcal of energy present in one molecule of ATP & on oxidation of one mole of glucose into $CO_2$ and $H_2O$ energy released in 686 kcal. So no. of ATP which can store this energy would be = 57.1 = 57 ATPs.

Answer: (c)

In the electron transport system, the final acceptor of proton is oxygen. Oxygen functions as the terminal acceptor of electrons and is reduced to water along with the hydrogen atoms in mitochondrial matrix. It drives whole process by removing hydrogen from system.

Answer: (a)