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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Variety among amino acids is produced due to_____________?
A NH2 group
B COOH group
C R group
D All of these
Correct Answer: R group
Which one are most complex sugar_____________?
A Monosaccharides
B Oligosaccharides
C Polysaccharides
D None of these
Correct Answer: Polysaccharides
Cn(H2O)n. is a general formula of_____________?
A Monosaccharides
B Oligosaccharides
C Ploysacharides
D Carbohydrates
Correct Answer: Carbohydrates
Specific heat of vaporization of water is_______________?
A 574 Kcal/kg
B 674 Kcal/kg
C 774 Kcal/kg
D 874 Kcal/kg
Correct Answer: 574 Kcal/kg
A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called__________?
A Lipid
B Carbohydrate
C Protein
D Carotein
Correct Answer: Carbohydrate
Which of the statement is not true for compounds like glycoprotein and glycolipids____________?
A They are conjugated molecules of carbohydrates
B Both have role in the extra cellular matrix of animals and bacterial cell wall
C They are components of biological membranes.
D Both are produced and secreted by endoplasmic reticulum
Correct Answer: Both are produced and secreted by endoplasmic reticulum
Which of the following carbohydrate is tasteless___________?
A Monosaccharide
B Oligosaccharide
C Polysaccharide
D None of these
Correct Answer: Polysaccharide
Which statement is true about an aqueous medium________________?
A Ionic as well as non ionic substance in aqueous media retains their identity
B Enzymes can not perform catalysis reaction in this medium
C Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
D It is less favorable media for chemical reactions
Correct Answer: Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
Maximum number of species of living things on earth are___________?
A Algae
B Fungi
C Insects
D Protozoa
Correct Answer: Insects
The mechanism of stomatal movement is related to the branch of Biology called__________?
A Taxonomy
B Physiology
C Morphology
D Anatomy
Correct Answer: Physiology
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