MDCAT BIOLOGY-Bioenergetics (SMART INSTITUTE)
MDCAT Biology: Bioenergetics Quiz
Test your knowledge on bioenergetics and photosynthesis with our MDCAT Biology quiz. This quiz covers a range of topics relevant to energy transfer in biological systems.
Whether you're a student preparing for exams or a biology enthusiast, challenge yourself with these key concepts:
- Photosynthesis processes
- Role of chlorophyll
- Cellular respiration phenomena
- Metabolic pathways and their significance
01-The products of photosynthesis in green plants:
C6H12O6 +6O2
C6H12O6 +6O2+H2O+energy
(CH2O)n +H2O+2S
C6H12O6 +6O2+6H2O
02. Z-scheme is another name used for:
Cyclic photophosphorylation
Non-cyclic photophosphorylation
Calvin Cycle
Oxidative phosphorylation
03-Photsystem-II has reaction center of:
P680
P730
P700
P660
04-WOF is a molecule formed in metabolic pathway by the equal splitting of a phosphorylated hexose into two halves?
Acetyl coenzyme A
Fructose 1,6-bisphosphate
Ribulose bisphosphate
Triose phosphate
05-What is the function of molecular oxygen in cellular respiration?
To cause the breakdown of citric acid
To combine with glucose to produce carbon dioxide
To combine with carbon from organic molecules to produce carbon dioxide
To combine with hydrogen from organic molecules to produce water
06-How many moles of carbon dioxide are produced by the complete oxidation of 1 mole of pyruvate?
1
3
4
6
07-The reaction which occurs in thylakoid interior space:
Photolysis
Transport of electrons
ATP synthesis
Dark reaction
08-In photosynthetic prokaryotes, WOF might be absent?
Grana
Chlorophyll
Thylakoid like membranes
ATP synthase
09-The wavelengths of light least absorbed by carotenes are:
Blue to green
Yellow to orange
Red to orange
Yellow to red
10-What will be the number of carbon and hydrogen atoms respectively in the tail of chlorophyll b molecule?
20, 39
55,72
20, 40
55, 70
11-A plant shifts from cyclic to non-cyclic flow of electron when:
It has low reducing power
It runs low on assimilating power
Assimilating power is restored
It has sufficient reducing power
12-Photosystem I and II are differentiated on the basis of their:
Chlorophyll a
Primary electron acceptor
Chlorophyll b
Carotenoids
13-In WOF steps, NADH is formed without decarboxylation?
Isocitrate → @-ketoglutarate
@-ketoglutarate → succinate
Pyruvate → acetyl CoA
Malate → oxaloacetate
14-The oxidation of WOF will produce FADH2?
Malate
FAD
Fumarate
Succinate
15-Light energy is converted into chemical energy through the formation of:
NADPH2
ATP
ATP and NADPH2
RuBP
16-Photophosphorylation during photosynthesis consists of:
Cyclic and non-cyclic phosphorylation
Oxidative phosphorylation
Substrate level phosphorylation
Respiratory chain
17-The by-product of photosynthesis is:
Organic compound
Oxygen
NADPH2
Energy
18-Stroma is the ground matrix of:
Lysosomes
Oxysomes
Ribosomes
Chloroplast
19-In which wavelength of light, photosynthesis is maximum?
Red light
Green light
Blue light
Ultra-violet light
20-Source of protons within the chloroplasts is
Water
Excited chlorophyll molecules
Carbon dioxide
Rubisco
21-Dark reactions of carbon assimilation occur in:
Cytoplasmic matrix
Mitochondria
Leucoplasts
Chloroplasts
22-NADPH2 is produced in photosynthesis during:
Dark reaction
Non-cyclic photophosphorylation
Pseudocyclic photophosphorylation
Cyclic photophosphorylation
23-Chlorophyll consists of:
A head of phytol and tail of four pyrrole rings
A head of linked carbons and tail of four pyrrole rings
A head of four pyrrole rings and tail of linked nitrogens
A head of four pyrrole rings and a phytol tail
24-The number of carbon atoms present in ribulose:
6
5
4
3
25-ATP molecules required for synthesis of a glucose molecule in Calvin-Benson cycle are:
36
38
12
18
26-Photophosphorylation is synthesis of:
ADP from ATP
Glucose 6-phosphate from glucose
ATP from ADP
NADP+ from NAD+
27-For fixing 3 molecules of CO2 in Calvin cycle, what is needed?
9ATP + 6NADPH2
18 ATP +12NADPH2
6ATP + 9NADPH2
3 ATP + 3NADPH2
28-WOF represents de-phosphorylation?
Fructose 1-phosphate → Fructose 1,6-bisphosphate
Fructose 1,6-bisphosphate → Fructose 1-phosphate
Fructose 1-phosphate → Fructose 6-phosphate
Glucose 6-phosphate → Fructose 1-phosphate
29-In cellular respiration, product formed as a result of release of energy:
ATP
NADH
Oxygen
Glucose
30-The difference between respiration and combustion is related to respiration being:
Multistep reactions
Enzyme controlled
Intracellular
All of above
31-When a molecule of pyruvic acid is subjected to anaerobic respiration and forms lactic acid then:
2 ATP are formed
4 ATP are formed
No ATP are formed
6 ATP are formed
32-WOF process is used in the conversion of pyruvate to acetyl CoA?
Decarboxylation
Dehydrogenation
Dehydration
Both decarboxylation and dehydrogenation
33-The net gain of energy from one molecule of glucose during aerobic respiration in prokaryotes is:
2 ATP
4 ATP
38 ATP
40 ATP
34-In plants, energy is released during the process of:
Photosynthesis
Transpiration
Respiration
Water absorption
35-Incomplet breakdown of sugars in anaerobic respiration forms:
Fructose and water
Glucose and CO2
Alcohol and CO2
Water and CO2
36-Following is correct sequence of energy transfer between photosynthetic pigments:
Chl.a → chl.b →carotenoids
Chl.b → carotenoids →chl.a
Carotenoids → chl.b →chl.a
In any direction
37-Conversion of light energy into chemical energy is function of:
Mitochondria
Stroma of chloroplast
Cytoplasm
Grana
38-All of following are differences between chl.a and b except:
Chl.a has different types while chl.b has single type
Chl.a have functional group -CH3 but b have -CHO
Chl.a is necessary pigment but b is accessory pigments
Chl.a is present in antenna complex while chl.b is in reaction center
39-Following is obtained during cyclic photophosphorylation:
ATP
O2
NADPH2
All of above
40-During process of lactic acid fermentation:
CO2 is produced
Ethanol is produced
NADH2 is oxidized
ATP are produced
41-How many molecules of ATP are required to convert a molecule of RuP into RuBP during Calvin cycle?
1
3
2
6
42-All of the following processes of aerobic respiration occur in mitochondria except:
Kreb's cycle
Respiratory chain
Pyruvic acid oxidation
Glycolysis
43-Conversion of isocitrate to @-ketoglutarate during Kreb's cycle is:
Decarboxylation
Oxidation
Both of above
Isomerism
44-ATP production occurs during all of the following steps of aerobic respiration except:
Glycolysis
Pyruvic acid oxidation
Kreb's cycle
Electron transport chain
45-Increased production of NADH during Krebs cycle exert an inhibitory effect on WOF enzymes?
Phosphofructokinase
Succinic dehydrogenase
Pyruvate decarboxylase
Cytochrome oxidase
46-Gross production of ATP molecules during Glycolysis is:
2
6
4
8
47-Action spectrum of photosynthesis was described in 1883 by:
Robert Hill
T.W Englemann
M. Calvin
Hatch and Slack
48-The molecular regenerated by fermentation:
O2
NAD+
ATP
Pyruvate
49-Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are able to survive. The best way to detect the lack of photosystem II in these organisms would be:
To determine if they have thylakoids in the chloroplasts
To test for liberation of O2 in the light
To test for CO2 fixation in the dark
To do experiments to generate an action spectrum
50-Conversion of NAD+ into NADH requires:
2 electrons, 1 proton
1 electron, 2 protons
E electrons 2 protons
1 electrons 1 proton
51-Carotenoids absorb strongly:
Red to orange
Yellow red
Yellow green
Blue-violet
52-The source of oxygen release during photosynthesis is:
Water
Glucose
CO2
Oxidation of chlorophyll
53-Incorrect statement for photosynthesis is:
It occurs during day time
It requires chlorophyll
It uses water with CO2
It uses Oxygen
54-Which is not true for dark reaction?
It does not require light directly
It is also called carbon cycle
It uses ATP from oxidative phosphorylation
Glyceraldehyde is produced in dark reaction
55-Where does the light reaction take place?
Stroma
Chloroplast
Thylakoid membrane
Leucoplast
56-Spectrophotometer is used to measure:
Absorption of CO2
Reflection of pigments
Absorption of O2
Absorption of different wavelengths
57-Magnesium is central part of:
Porphyrin ring
Pyrrole ring
Phytol tail
Hydrophobic part
58-Which shows the effectiveness of wavelengths of light driving photosynthesis?
Absorption spectrum
Broad spectrum
Action spectrum
Engelman spectrum
59-Each photon of light excites how many electrons?
1
2
4
6
60-During cyclic phosphorylation, electron passes from all except:
Photosystem I
Photosystem II
Ferridoxin
Cytochrome complex
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