Free MCQs & Online Quiz Practice for Exams

Q: Which of the following molecules is regenerated from phosphoglyceraldehyde in Calvin cycle?

A) Phosphoglyceric acid

B) Plastoquinone

C) Ribulose biphosphate

D) CO₂

Q: The end products of non-cyclic electron pathway is

A) ATP

B) NADPH₂

C) ATP and NADPH₂

D) FADH₂

Q: The final electron acceptor in non-cyclic electron pathway is

A) ATP

B) NADP

C) FADH

D) ADP

Q: ATP generated within the Krebs cycle is called

A) Photophosphorylation

B) Oxidative phosphorylation

C) Substrate-level phosphorylation

D) Electron transport chain

Q: The electron carriers of chloroplast are present in

A) Matrix of stroma

B) Inter-membrane space

C) Within the thylakoid space

D) Within its thylakoid

Q: In a eukaryotic cell the Krebs cycle occurs in

A) Cytosol

B) Nucleus

C) Chloroplast

D) Mitochondria

Q: Within the mitochondria the proton gradient develops across the

A) Outer membrane

B) Inner membrane

C) Inter-membrane space

D) Matrix

Q: Which of the following generates more energy in aerobic respiration?

A) Glucose

B) Triglyceride

C) Protein

D) Sucrose

Q: Phosphoenolpyruvate carboxylase is used in C4 Plants to

A) Fix CO₂

B) Fix O₂

C) Reduce RUBP

D) Reduce pyruvate molecule

Q: Potassium dichromate acts as a strong:

A) oxidizing agent

B) reducing agent

C) bleaching agent

D) Dehydrating agent

Q: Which of the molecules contain chiral center?

A) n-butyl bromide

B) isobutyl bromide

C) sec-butyl bromide

D) tert-butyl bromide

Q: A compound when treated with sodium amide yield a salt. The compound is_____________

A) C₂H₄

B) C₃H₄

C) C₆H₆

D) C₆H1₂

Q: Nitro-benzene reacts with Chlorine in presence of AICI₃, The major product obtained is ____________

A) O-Chloronitrobenzene

B) m-Chloronitrobenzene

C) p-Chloronitrobenzene

D) no reaction occurs at all

Q: Which of the following rhythm controls our sleep-wake cycle?

A) Infradian

B) Circadian

C) Circannual

D) Ultradian

Q: The length of a circadian cycle is

A) 28 hours

B) 24 hours

C) 24 days

D) 1 year

Q: Which of the following is true of circadian rhythms?

A) They are artificial inventions of timekeepers.

B) They are internally driven and externally regulated cycles.

C) They are sequences of events that occur once a month.

D) They occur on the same schedule regardless of the changes from day to night.

Q: A Chimpanzee using a stick to collect ants to have as a snack is an example of

A) Inherited Trait

B) Learned Behaviour

C) Instinctive Behaviour

D) Autonomic Response

Q: In a vertebrate a reflex action is induced by

A) Sensory nerve

B) Motor nerve

C) Autonomic Response

D) Sympathetic nerve

Q: Who at first demonstrated the conditioned reflex?

A) Karl von Frisch

B) Robert Brown

C) William Harvey

D) Pavlov

Q: Which of the following is change of behaviour by life experiences?

A) Instinct

B) Maturation

C) Learning

D) Imprinting