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MDCAT Bioenergetics

Total questions: 50

Worksheet time: 26mins

Name
Class
Date
1.

Final acceptor of electron in ETC is

a)

Water

b)

NADH

c)

Oxygen

d)

All of these

2.

Which of the following occurs in Calvin cycle?

a)

Oxidation carboxylation

b)

Oxidative phosphorylation

c)

Reduction carboxylation

d)

Phosphorylation

3.

Pyruvate dehydrogenase is used in converting

a)

Glucose to Pyruvate

b)

Pyruvate to glucose

c)

Pyruvic acid to lactic acid

d)

Pyruvate to acetyl CoA

4.

Dark reaction of photosynthesis is called so because

a)

It can also occur in dark

b)

It occur more rapidly in night

c)

It does not require light energy

d)

Cannot occur during day time

5.

Cytochromes occur in

a)

Outer mitochondria membrane

b)

Cristae of mitochondria

c)

Matrix of mitochondria

d)

Entire inner mitochondrial membrane

6.

The two peaks of light absorption of chlorophyll "a" are near

a)

400 and 500nm

b)

430 and 670nm

c)

400 and 660nm

d)

430 and 730nm

7.

Kelvin cycle is also known as :

a)

Calvin cycle

b)

Glvoxylate cycle

c)

Citric acid cycle

d)

Glycolate cycle

8.

The formation of acetyl co enzyme -A from pyruvic acid is the result of its

a)

Reduction

b)

Oxidation decarboxylation

c)

Dehydration

d)

Dephosphorylation

9.

Photosynthesis occur by terrestrial plant is

a)

10%

b)

0.1%

c)

100%

d)

1%

10.

Which of the following is the non-polar part of chlorophyll?

a)

Pyrrole

b)

Phytol

c)

Antenna complex

d)

Porphyrin

11.

Chlorophyll molecules (PS-ll) when excited,the released electron firstly goes to

a)

Ferredoxin

b)

Plastoquinone

c)

Plastocyanin

d)

Ferredoxin reducing substrate

12.

The site of oxygen evolution and photosynthetic phosphorylation in chloroplast are

a)

Surface of chloroplast

b)

Matrix

c)

Grana stacks

d)

Inner wall of chloroplast

13.

Carotenoids increase spectrum of light by absorb

a)

Blue violet

b)

Blue green

c)

Green

d)

Blue

14.

In chlorophyll a and b the variable atom are

a)

C__O

b)

C__H

c)

H__O

d)

C__N

15.

Chlorophyll a is not present in

a)

Green algae

b)

Plants

c)

Brown algae

d)

Bacteria

16.

Carotenoids are present in cells of

a)

Eye

b)

Teeth

c)

Nerve

d)

Muscle

17.

Photosystem ll is concerned with

a)

Formation of glucose

b)

Reduction of CO2

c)

Photolysis of water

d)

Formation of NADPH

18.

The colour of chlorophyll b is

a)

Violet green

b)

Red green

c)

Yellow green

d)

Blue green

19.

During Krebs cycle, hydrogen of Succinate is accepted by

a)

FADH

b)

NAD

c)

NADP

d)

FAD

20.

Hydrocarbon tail of chlorophyll is

a)

Pyrrole ring

b)

Hydrophilic

c)

Porphyrin

d)

Hydrophobic

21.

One Calvin cycle is involved in fixation of

a)

2 CO molecules

b)

1CO2 molecules

c)

3CO2 molecules

d)

None of above

22.

The portion of chlorophyll that absorb light is

a)

Porphyrin

b)

Phytochrome

c)

Reaction center

d)

Phytol

23.

Photosynthetic pigments in chloroplast are embedded in membrane of

a)

Thylakoids

b)

Matrix

c)

Photoglobin

d)

Envelope of chloroplast

24.

Chlorophyll a is protected by intense light by

a)

Carotenoids

b)

Weather

c)

Climate

d)

Chlorophyll b

25.

Which of the following is not present in ETC in photosynthesis

a)

PQ

b)

CoQ

c)

PC

d)

Cytochrome complex

26.

Citric acid cycle involves oxidation of:

a)

Oxaloacetate

b)

Citrate

c)

Acetyl CoA

d)

Pyruvate

27.

Which of these is an oxidizing agent in Krebs cycle?

a)

FAD

b)

ATP

c)

GDP

d)

CoenzymeQ

28.

ATP produced in aerobic respiration inhibits

a)

Pyruvate decarboxylase

b)

Phosphofructokinase

c)

NADH production

d)

Pyruvate formation

29.

Most free energy is released when bond of ____ phosphate is broken by hydrolysis

a)

First

b)

Second

c)

Third

d)

Fourth

30.

Haemoglobin resembles chlorophyll in :

a)

Porphyrin ring

b)

Pyrrole ring composition

c)

Hydrocarbon tail

d)

Both A and B

31.

Chloroplast are mainly present in the

a)

Cholenchyma cells

b)

Chlorenchymatous tissue

c)

Sclerenchma cell

d)

Parenchyma cells

32.

Which of the following wavelength are least absorbed by chlorophyll?

a)

Red

b)

Blue

c)

Green

d)

Both A and B

33.

Glycolysis occur in

a)

Stroma

b)

Cytosol

c)

Lumen

d)

Mitochondrial membrane

34.

Glucose metabolism depends on:

a)

The movement of hydrogen ions

b)

Ionization of electrons from glucose molecules

c)

Availability of oxygen

d)

Absence of oxygen molecules

35.

Which of these are reduced during Calvin cycle?

a)

RuBP

b)

3PG

c)

1,3BPG

d)

G3P

36.

The molecule of carbon dioxide are required to make six molecule of:

a)

3-Phosphoglycerate

b)

1,3-Bisphosphoglycerate

c)

Ribulose bisphosphate

d)

Glyceraldehyde 3-phosphate

37.

The dark reactions take place in/on the_____

a)

Thylakoid lumen

b)

Stroma

c)

Thylakoid membrane

d)

Grana

38.

Which of the following compound can be rightly called CO2 acceptor?

a)

G3P

b)

1,3BPG

c)

3PG

d)

RuBP

39.

Chlorophyll a is different from chlorophyll b by the presence of :

a)

Carbonyl group

b)

Carboxyl group

c)

Methoxy group

d)

Methyl group

40.

Chlorophyll a is _____ in color :

a)

Blue -yellow

b)

Yellow _red

c)

Blue _green

d)

Yellow _green

41.

Chlorophyll are soluble in :

a)

Water

b)

Organic solvent

c)

Inorganic liquid

d)

Both a and b

42.

Light dependent reactions convert solar energy into_____

a)

Light energy

b)

Hydrothermal energy

c)

Chemical energy

d)

Mechanical energy

43.

Air has ____ percent of CO2.

a)

0.03-0.01

b)

0.0.1-3.00

c)

2-3

d)

0.03_0.04

44.

Which of the following compounds are reduced during the photosynthesis:

a)

Water

b)

Oxygen

c)

Carbon dioxide

d)

Glucose

45.

Each mesophyll cell has about how many chloroplasts?

a)

Half a million

b)

1200

c)

20-100

d)

12000

46.

A chlorophyll molecule has how many main parts

a)

One

b)

Three

c)

Two

d)

Four

47.

When there is no net gas exchange between the leaves and the atmosphere.this is termed as

a)

Respiration

b)

Photosynthesis

c)

Compensation point

d)

Metabolism

48.

The first action spectrum was obtained by German biologist ,T.W.Engelmann in 1883.He worked on.

a)

Chlorella

b)

Fungi

c)

Hydrilla

d)

Spirogyra

49.

Graph showing relative effectiveness of different wavelengths (colours) of

a)

Absorption spectrum

b)

Action spectrum

c)

Atomic spectrum

d)

None

50.

Carotenoids absorb strongly which of following range

a)

Blue _violet

b)

Orange _red

c)

Yellow _orange

d)

Green

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