RESPIRATION IN HIGHER PLANTS

A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 B 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Section-A

1.Which of these steps in Krebs’ cycle indicates substrate level phosphorylation?


Conversion of succinyl acid to ∝-ketoglutaric acid
Conversion of succinic acid to malic acid
Conversion of succinyl Co-A to succinic acid
Conversion of malic acid to oxalo acetic acid

2.The total energy trapped per gm mole of glucose is 1292 kJ with on efficiency of

35%
55%
45%
25%

3.The released energy obtained by oxidation is stored as

A concentration gradient across a membrane
ADP
ATP
$NAD^+$

4.Last electron acceptor during ETS is

$O_2$
cyt-a
cyt-$a_2$
cyt-$a_3$

5.Which of the following is a 4-carbon compound?

Oxaloacetic acid
Phosphoglyceric acid
Phosphoglyceric acid
Phosphoenol pyruvate

6.The following is a simplified scheme showing the fate of glucose during aerobic and anaerobic respiration. Identify the end products that are formed at stages indicated as A, B, C and D. identify the correct option from these given below.


A- Carbon dioxide and water, B- Pyruvic acid, C- Ethyl alcohol and carbon dioxide, D- lactic acid
A- Pyruvic acid, B- Carbon dioxide and water, C- Lactic acid , D- Ethyl alcohol and carbon dioxide
A-Pyruvic acid, B- Carbon dioxide and water, C- Ethyl alcohol and carbon dioxide, D- Lactic acid
A. Pyruvic acid, B- Ethyl alcohol and carbon dioxide, C- Lactic acid, D- Carbon dioxide and water

7.A businessman of 80 kg weight requires 4800 kcal energy daily. How many ATP molecules and glucose molecules does he require to produce this much energy?

20 molecules of glucose and 384 molecules of ATP
40 molecules of glucose and 264 molecules of ATP
18 molecules of glucose and 657 molecules of ATP
20 molecules of glucose and 460 molecules of ATP

8.Oxidative phosphorylation refers to

Anaerobic production of ATP
The citric acid cycle production of ATP
Production of ATP by chemiosmosis
Alcoholic fermentation

9.Product of glycolysis is

Citric acid
Dihydroxy acetone
Pyruvic acid
Phosphoenol pyruvate

10.Common enzyme in glycolysis and pentose phosphate pathway is

Hexokinase
aconitase
Fumarase
Dehydrogenase

11.A competitive inhibitor of Succinic Dehydrogenase is

Malonate
Oxaloacetate
α-ketoglutarate
Malate

12.Which one is correct sequence in glycolysis?

G-6-P→PEP → 3-PGAL → 3-PGA
G-6-P→3-PGAL → 3-PGA → PEP
G-6-P→PEP → 3-PGA → 3-PGAL
G-6-P→3-PGA →3-PGAL → PEP

13.Total gain of ATP molecules during aerobic respiration of one molecule of glucose

36
38
40
34

14.RQ value of 4 may be expected for the complete oxidation of which one of the following?

Glucose
Malic acid
Oxalic
Tartaric acid

15.Which specialised cell provides interconnectivity for air spaces?

Parenchyma
Chlorenchyma
Sclerenchyma
None of these

16.Respiratory Quotient (RQ) is one in case of

Fatty acids
Nucleic acids
Carbohydrates
Organic acids

17.The enzymes for TCA cycle are present in

Plastids
Golgi complex
Mitochondria
Endoplasmic reticulum

18.In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?

Fructose-6-phosphate → Fructose-1, 6-bisphosphate
3-phosphate-glyceraldehyde → 1, 3 bisphosphoglyceric acid
PEP → Pyruvic acid
2- phosphoglycerate → PEP

19.How many $NADH + H^+$ molecule is released in Kreb’s cycle?

3
6
12
14

20.In aerobic respiration removal 3 molecules of $CO_2$ occurs in

Matrix of the mitochondria
Inner membrane of the mitochondria
Both Matrix and Inner membrane of the mitochondria
Anywhere in the mitochondria

21.Which one is not correct about Krebs’ cycle?

It is also called citric acid cycle
The intermediate compound which links glycolysis with Krebs’ cycle is malic acid
It occurs in mitochondria
It starts with six carbon compound

22.The metabolic pathway through which the electron passes from one carrier to another is called

Electron transport system
Electron procedure system
Electron moving procedure
None of the above

23.During Kreb’s cycle of __A__ NADH, __B__ ATP is produced through ETS in mitochondria. Choose, the correct pair from the option given below

A-2; B-4
A-4; B-2
A-6, B-18
A-2; B-8

24.Which of the following respiratory substrates requires the highest number of oxygen molecules for its complete oxidation?

Tripalmitin
Triolein
Tartaric acid
Oleic acid

25.Choose the correct statement for the given options

Intermediates in the pathway are utilised to synthesise other compounds
No alternative substrates other than glucose is allowed to enter the pathway at intermediate stages
None of the substrate is respired in the pathway at intermediary stages
Pathway functioning is insequential

26.Most of the biological energy is supplied by mitochondria through

Breaking of proteins
Reduction of $NADP^+$
Breaking of sugars
Oxidising TCA (tricarboxylic acid) substrate

27.In anaerobic respiration the correct sequence of catabolism of glucose is

Glycolysis, TCA cycle, oxidative phosphorylation
Glycolysis, fermentation
Glycolysis, oxidative phosphorylation, TCA cycle
Oxidative phosphorylation, TCA cycle, glycolysis

28.Identify the specific group, which carries out the following biochemical reaction:
Aspartic acid+α-ketoglutaric acid →Oxaloacetic acid+Glutamic acid

Synthetases
Peptidases
Transaminases
Lyases

29.In respiration incomplete oxidation of glucose is done under

Aerobic respiration
Anaerobic respiration
Both of these
None of these

30.Synthesis process in organism is also called

Catabolism
Anabolism
Both of these
None of these

31.Among the following, identify the substrate required for the only oxidative reaction that occurs in the process of glycolysis

3-phosphoglyceric acid
Glyceraldehyde 3-phosphate
Fructose-6-phosphate
Glucose-6-phosphate

32.How much percentage of energy is released during lactic acid and alcoholic fermentation?

2
9
8
Less than 7

33.Steps of respiration are controlled by

Substrates
Enzymes
Hormone
Bile juice

34.Glycolysis
I. causes partial oxidation of glucose (one molecule) to form 2-molecules of pyruvic acid and 2 ATP as net gain
II. takes place in all living cells
III. uses 2 ATP at two steps
IV. scheme was given by Gustav Embden, Otto Mayerhof and J Parnas
Choose the correct option containing appropriate statements from the above

I, II and III
I, II and IV
I, II, III and IV
Only I

35.Pyruvate →$C_2 H_3 OH+CO_2$
The above reaction needs two enzymes named as

Pyruvate decarboxylase and alcohol dehydrogenase
Pyruvate decarboxylase and enolase
Pyruvate decarboxylase and pyruvate kinase
Pyruvate carboxylase and aldolase

Section-B

36.What is the net ATP molecules gain, when 4 molecules of glucose undergo anaerobic respiration in plant?

8 ATP
20 ATP
144 ATP
16 ATP

37.In which of the following reactions of glycolysis, oxidation takes place?

Glucose $6-PO_4$ to fructose $6-PO_4$
Glyceraldehydes 3-phosphate to 1, 3-diphosphoglycerate
1,3-diphosphoglycerate to 3-phosphoglycerate
2-phosphoglycerate to phosphoglycerate

38.How many PGAL are produced by glycolysis of 3 molecules of glucose? How many ATP are released by respiration of these PGAL till formation of $CO_2$ and $H_2O$?

4 PGAL- 80 ATP
6 PGAL- 160 ATP
4 PGAL- 40 ATP
6 PGAL- 120 ATP

39.Biological oxidation in Krebs’ cycle involves

$O_2$
$CO_2$
$O_3$
$NO_2$

40.The respiratory quotient during cellular respiration would depend on the

Nature of enzymes involved
Nature of the substrate
Amount of carbon dioxide released
Amount of oxygen utilized

41.The cellular respiration first takes place in the


Cytoplasm
Golgi bodies
ER
Lysosomes

42.When one molecule of glucose is completely oxidized during aerobic respiration, how many molecules of carbon dioxide are released due to Tricarboxylic acid cycle?

1
2
3
4

43.An example of non-competitive inhibition is

The inhibition of succinic Dehydrogenase by Malonate
Cyanide action on cytochrome oxidase
Sulpha drug on folic acid synthesizing bacteria
The inhibition of Hexokinase by glucose 6-phosphate

44.Match the compounds given in column I with the number of carbon atoms present in them which are listed under column II. Choose the answer which gives the correct combination of alphabets of the two columns.

Column-I Column-II
(A) Oxaloacetate (1) 6C-compound
(B) Phosphoglyceraldehyde (2) 5C- compound
(C) Isocitrate (3) 4C –compound
(D) ∝-ketoglutarate (4) 3C –compound
(5) 2C- compound

A-4,B-5,C-2,D-3
A-3,B-4,C-1,D-2
A-3,B-5,C-1,D-2
A-2,B-4,C-1,D-5

45.Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?

Glucose-6-phosphate
Fructose, 6-bisphosphate
Pyruvic acid
Acetyl Co-A

46.Which one of the following pairs is wrongly matched?

Methanogens – Gobar gas
Yeast – Ethanol
Streptomycetes – Antibiotic
Coliforms – Vinegar

47.Enzymes found attached to inner membrane of mitochondria instead of matrix is/are

Succinic Dehydrogenase
Cytochrome oxidase
Both Succinic Dehydrogenase & Cytochrome oxidase
Malic Dehydrogenase

48.In glycolysis from glucose to pyruvic acid involves more than seven reaction. Each individual reaction needs

One molecule of ATP
One molecule of ADP
One molecule of NAD
One molecule of specific enzyme

49.The main purpose of electron transport chain is to

Cycle $NADH + H^+$ back to $NAD^+$
Use the intermediate from TCA cycle
Breakdown pyruvic acid
All of the above

50.Before entering respiratory pathway amino acids are

Decarboxylated
Hydrolysed
Deaminated
Phosphorylated