Free MCQs & Online Quiz Practice for Exams

Q: The main difference between catalysts and enzymes is (ETEA 2018)

A) Enzymes are sharper in action than catalysts

B) Catalysts are used in large amount than enzymes

C) Catalysts are inorganic while enzymes are organic in nature

D) Enzymes need pH while catalysts do not

Q: Phosphatases belong to which group of the following? (ETEA 2019)

A) Lyases

B) Ligases

C) Hydrolases

D) None of the above

Q: The optimum pH of enzyme urease is (ETEA 2019)

A) 7.8–8.7

B) 7.0

C) 4.5

D) 8.0

Q: The processes responsible for energy production in animals are (ETEA 2005)

A) Photosynthesis

B) Digestion

C) Respiration

D) Circulation

Q: Which is least important in photosynthesis? (ETEA 2005)

A) Red light

B) Blue light

C) Sunlight

D) Green light

Q: Photo-respiration occurs when (ETEA 2006)

A) Stomata are opened

B) Day is humid

C) Concentration of CO₂ inside leaf is high

D) Concentration of O₂ inside leaf is high

Q: Which one of the following in glycolysis is hydrogen carrier? (ETEA 2006)

A) ADP

B) PGAL

C) DPGA

D) NAD

Q: How many ATPs are produced during non-cyclic photophosphorylation (ETEA 2007)

A) 2

B) 4

C) 6

D) 8

Q: Which of the following bonds is broken first in glycolysis to release energy? (ETEA 2007)

A) Glycosidic

B) Peptide

C) Ester

D) None of the above

Q: Which of the following type of cytochrome is common in photosynthesis and respiration? (ETEA 2008)

A) Cyt-a

B) Cyt-b

C) Cyt-a₃

D) Cyt-c

Q: Calvin cycle takes place within (ETEA 2008)

A) Stroma of the chloroplasts

B) Granum of the chloroplasts

C) Cytoplasm of the cell

D) Lysosomes

Q: The step in glycolysis in which energy transfer is not involved is (ETEA 2008)

A) Glucose phosphate→fructose diphosphate

B) Fructose diphosphate→DHAP

C) PGAL→PGAP

D) PGAP→PGA

Q: Each molecule of FADH₂ entering the electron transport chain produces (ETEA 2009)

A) 4 ATP

B) 2 ATP

C) 1 ATP

D) 3 ATP

Q: During cellular respiration NADH₂ generates (ETEA 2010)

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 5 ATP

Q: Which of the following is present in the center of the porphyrin ring of chlorophyll? (ETEA 2010)

A) Iron

B) Sodium

C) Potassium

D) Magnesium

Q: The amount of energy in food is measured in (ETEA 2011)

A) ATP

B) Calories

C) ADP

D) Carbohydrates

Q: Plant cells synthesize sugar in the (ETEA 2011)

A) Thylakoid

B) Grana

C) Stroma

D) Crista

Q: In chlorophyll a the group attached to porphyrin ring is (ETEA 2011)

A) Hydroxyl group

B) Methyl group

C) Carboxyl group

D) Aldehyde group

Q: Chlorophyll is protected from intense light by (ETEA 2011)

A) Plant hormones

B) Carotenoids

C) Plant enzymes

D) Water present in mesophyll tissue

Q: Glycolysis completes with the net gain of (ETEA 2012)

A) 2 ATP

B) 3 ATP

C) 4 ATP

D) 32 ATP