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201.

R.Q. indicatesA. Effect of temperatureB. Nature of respiratory substrateC. Amount of water releasedD. Type of alcohol formed.

Answer» Correct Answer - B
202.

Which one of the following has the highest R.Q.A. Malic acidB. ProteinC. FatD. Starch.

Answer» Correct Answer - A
203.

Alveoli become enlarged and damaged with reduced surface area in heavy smokers. the condition is called ……….. (a) Silicosis (b) Emphysema (c) Asthma (d) Bronchitis

Answer»

(b) Emphysema

204.

Due to vibration of vocal cords sounds are produced. These sounds are produced during …………A) Inhalation B) Expiration C) Contraction D) Relaxation

Answer»

Due to vibration of vocal cords sounds are produced. These sounds are produced during Expiration

205.

R.Q. of respiratory substrate `C_(99)H_(72)O_(6)` would beA. 0.718B. 1.34C. 2.71D. 3.25

Answer» Correct Answer - A
206.

NADH is produced inA. Photosystem IIB. Photosystem IC. GlycolysisD. Both A and B

Answer» Correct Answer - C
207.

60% of respiration in liver cells is performed throughA. Phosphogluconate shuntB. GlycolysisC. Anaerobic respirationD. Common pathway.

Answer» Correct Answer - A
208.

Which of the choices below is not a functional process performed by the respiratory system ? A) Pulmonary ventilation B) Transport of respiratory gases C) External respiration . D) Pulmonary respiration

Answer»

B) Transport of respiratory gases

209.

The energy value of a single ATP molecule is………A) 2700 calories B) 7200 calories C) 32 calories D) 52 calories

Answer»

B) 7200 calories

210.

The number of ATP molecules produced by electron transport system from Krebs cycle intermediates in a single trun isA. 11B. 12C. 14D. 16

Answer» Correct Answer - A
Total energy production is 3 NADH +`H^(+)`, 1 `FADH_(2)" and "1` ATP/GTP. Intermediates form ATP on ETS. Is `3xx3(for NADH+H^(+)),2xx1 (for FADH_(2))` or 11.
211.

The correct labelling of P, Q, R and S in the above diagram is:A) P – Epiglottis, Q – Larynx, R – Trachea, S – Bronchioles B) P – Larynx, Q – Epiglottis, R – Bronchioles, S – Trachea C) P – Trachea, Q – Epiglottis, R – Larynx, S – Bronchioles D) P – Bronchioles, Q – Larynx, R – Trachea , S – Epiglottis

Answer»

A) P – Epiglottis, Q – Larynx, R – Trachea, S – Bronchioles

212.

Krebs cycle producesA. `2CO_(2)`B. `3CO_(2)`C. `4CO_(2)`D. `6CO_(2)`

Answer» Correct Answer - A
213.

Arrange the flow chart in a proper way. A) 1, 2, 4, 5, 3 B) 3, 4, 5, 1, 2 C) 1, 5, 4, 3, 2 D) 1, 2, 3, 4, 5

Answer»

(D) 1, 2, 3, 4, 5

214.

Coenzyme A helps inA. Oxidative phosphorylationB. Substrate level phosphorylationC. Breakdown of pyruvateD. Activation of acetyl group

Answer» Correct Answer - D
215.

Removal of hydrogen and `CO_(2)` from a substrate is calledA. DecarboxylationB. OxidationC. Oxidative decarboxylationD. Reductive decarboxylation.

Answer» Correct Answer - C
216.

The oxygen picked up by haemoglobin gets ____ with blood to various parts of the body

Answer» Correct Answer - transported
217.

Oxidation of pyruvate formsA. Acetyl CoAB. NADHC. `CO_(2)`D. All the above

Answer» Correct Answer - D
218.

Oxidation of pyruvate is accompanied byA. Oxidation of `NAD^(+)`B. Reduction of `NAD^(+)`C. Oxidation of CoAD. Reduction of CoA

Answer» Correct Answer - B
219.

The first phase in the breakdown of glucose in animal cell isA. Krebs cycleB. GlycolysisC. Oxidative phosphorylationD. E.T.C.

Answer» Correct Answer - B
220.

Oxidation of pyruvate to `CO_(2)" and "H_(2)O` occurs throughA. Citric acid cycleB. Tricarboxylic acidC. Krebs cycleD. All the above

Answer» Correct Answer - D
221.

General formula for aerobic respiration isA. `6CO_(2)+6H_(2)OrarrC_(6)H_(12)O_(6)+6O_(2)`B. `C_(6)H_(12)O_(6)+6O_(2)rarr6CO_(2)+6H_(2)O+686 kcal`C. `C_(6)H_(12)O_(6)rarr2C_(2)H_(5)OH+2CO_(2)+2ATP`D. `C_(6)H_(2)O_(6)rarr2C_(3)H_(6)O_(3)+2ATP`.

Answer» Correct Answer - B
222.

Pyruvate may be converted into ethanol and ` CO_(2)` during ______

Answer» Correct Answer - fermentation
223.

Energy required to form glucose from pyruvate is equivalent toA. 32 ATPB. 16 ATPC. 8 ATPD. 4 ATP.

Answer» Correct Answer - C
It is reverse of glycolysis.
224.

Glucose → Pyruvate → Lactic acid + Less energy A) Mitochondria B) Muscles C) Yeast D) Fungi

Answer»

Answer is (B) Muscles

225.

The correct order of parts in the given flow chart are :A) 1, 2, 4, 5, 3, 6, 7, 8, 9B) 1, 4, 2, 5, 3, 6, 7, 8, 9 C) 1, 4, 3, 2, 5, 6, 7, 8, 9 D) 1, 3, 4, 2, 5, 6, 7, 8,9

Answer»

B) 1, 4, 2, 5, 3, 6, 7, 8, 9

226.

which of the following is not a 3- carbon molecule ?A. PyruvateB. EthanolC. lactic acidD. All of the above

Answer» Correct Answer - b
227.

Assertion : Breathing slows down under resting stage Reason : Rate of breathing rises on vigorous exercise A) Both A and R are true B) ,A is true, R is false C) A is false, R is true D) Both A and R are false

Answer»

A) Both A and R are true

228.

Hiccough (hiccup) is due to activity of ……….. (a) Intercostal muscles (b) Food in air tract (e) Diaphragm (d) Inadequate oxygen in environment

Answer»

(c) Diaphragm

229.

The cells which do not respire ……….. (a) Epidermal cells (b) Sieve cells(c) Cortical cells (d) Erythocytes

Answer»

(d) Erythocytes

230.

How are alveoli designed to maximise the exchange of gases?

Answer»

The human lungs have been designed to maximise the exchange of gases as follows. 

1. The interior of lung is divided into millions of small chambers called alveoli. 

2. The presence of millions of alveoli in the lungs provide a very large surface area. 

3. If all alveoli of our lungs are spread out they will cover an area of nearly 160 m2

4. Availability of large surface area maximises the exchange of gases.

231.

where does the second stage of aerobic respeiration take place ?

Answer» Correct Answer - Mitochondria
232.

Fermentation isA. Incomplete oxidationB. Anaerobic respirationC. Excretory processD. None of the above

Answer» Correct Answer - B
233.

Glycolysis is conversion ofA. Glucose to glycogenB. Glycogen to glucoseC. Glucose to glucoseD. Glucose to citric acid.

Answer» Correct Answer - C
234.

Anaerobic respiration takes place inA. RibosomesB. NucleusC. VacuoleD. Cytoplasm.

Answer» Correct Answer - D
235.

The complete process of anaerobic respiration takes place in _______

Answer» Correct Answer - cytoplasm
236.

The bacteria which convert pyruvic acid to acetic acid is

Answer» Correct Answer - Yeast
237.

Anaerobic respiration takes place in

Answer» Correct Answer - Cytoplasm
238.

What is reason for muscular pain?

Answer»

Accumulation of lactic acid results in muscular pain.

239.

In how many steps glucose is oxidized?

Answer»

In all organisms, glucose is oxidized in two stages. In the first stage called glycolysis, it is converted into two molecules of pyruvic acid. 

In the second stage, if oxygen is available, pyruvic acid is oxidized to CO2 and water releases a lot of energy

240.

Give comment on Tracheal respiration.

Answer»

Tracheal respiration: It is the respiration that occurs through tube-like structures (trachea) present in insects.

241.

……………. is the movement of atmospheric air into the lungs.

Answer»

Inspiration is the movement of atmospheric air into the lungs.

242.

During inspiration, the diaphragm ……….. (a) expands (b) unchanged (c) relaxes to become dome-shaped (d) contracts and flattens

Answer»

(d) contracts and flattens

243.

…………… In a relaxed stage, the diaphragm is shaped.

Answer»

Dome In a relaxed stage, the diaphragm is shaped.

244.

During inspiration ………(a) Diaphragm and external muscles relax (b) Diaphragm and internal intercostal muscles relax (c) Diaphragm and external intercostal muscles contract(d) Diaphragm and internal intercostal muscles contract

Answer»

(c) Diaphragm and external intercostal muscles contract

245.

SARS is caused by a variant of ………..(a) Pneumococcus pneumonia (b) Common cold by Corona virus (c) Asthma (d) Bronchitis

Answer»

(b) Common cold by Corona virus

246.

Vamsi conducted the experiment shown in the diagram. The temperature in thermometer rises.Aim of this experiment is …………A) CO2 is evolved during germination. B) Heat is evolved during respiration.C) Alcohol is evolved during respiration. D) CO2 is evolved dining respiration.

Answer»

B) Heat is evolved during respiration.

247.

The parts which are present on the surface of roots to respire. A) Aerial roots B) Lenticels C) Air spaces D) Stomata

Answer»

(A) Aerial roots

248.

Identify the kind of respiration with the following end products. i) C2H5OH and CO2 ii) CO2 and H2O iii) Lactic acid A) i – Alcoholic fermentation, ii – Lactic acid fermentation, iii – Aerobic respiration B) i -Aerobic respiration, ii – Alcoholic fermentation, iii-Lactic acid fermentation C) i – Alcoholic fermentation, ii – Aerobic respiration, iii – Lactic acid fermentation D) All the above

Answer»

A) i – Alcoholic fermentation, ii – Lactic acid fermentation, iii – Aerobic respiration

249.

Ethanol can be separated from sugar – yeast solution by this method. A) Freezing B) Filtration C) Fractional distillation D) Cooling

Answer»

C) Fractional distillation

250.

Identify the electron transport inhibitor: (a) phosphophenol (b) dinitrophenol (c) xylene (d) indol acetic acid

Answer»

(b) dinitrophenol