The plasma membrane of an animal cell is composed of
Options
(a) proteins, lipids and polysaccharides (b) proteins, lipids and dissacharides (c) lipids, proteins and monosaccharides (d) lipids, proteins and oligosaccharides
Correct Answer: […]
The formula of chlorophyll-a is
Options
(a) C₅₆H₇₀O₆N₄ Mg (b) C₅₅H₇₂O₆N₄ Mg (c) C₅₅H₇₂O₅N₄ Mg (d) C₅₂H₇₀O₅N₄ Mg
Correct Answer:
C₅₅H₇₂O₅N₄ Mg
Explanation:
Chlorophyll ‘a’ has molecular formula of C₅₅H₇₂O₅N₄ Mg . Its […]
Ion carriers are located in
Options
(a) cellular space (b) nucleus (c) plasma membrane (d) cell wall
Correct Answer:
plasma membrane
Explanation:
No explanation available. Be the first to write the explanation for […]
In which of the following plant type is osmotic pressure the highest?
Options
(a) Mesophytes (b) Xerophytes (c) Halophytes (d) Hydrophytes
Correct Answer:
Halophytes
Explanation:
Halophytes or plants in saline soil shows maximum […]
Emerson effect is associated with
Options
(a) respiration (b) transpiration (c) salt absorption (d) photosynthesis
Correct Answer:
photosynthesis
Explanation:
Emerson (1943) discovered the existence of two photosystems (PSI and PSII). Emerson conducted experiments where […]
Which of the following molecules has the largest root mean square velocity at 25°C
Options
(a) NH₃ (b) SO₂ (c) H₂S (d) CO₂
Correct Answer:
NH₃
Explanation:
Temperature= 25⁰C, R.M.S velocity (ν r.m.s) […]
A helium, molecule is two times heavier than a hydrogen molecule at 298 K. The average kinetic energy of a helium molecule is
Options
(a) 2 times that of hydrogen molecule (b) half […]
The oxidation of one NADH₂ yields
Options
(a) 3 ATP (b) 18 ATP (c) 2 ATP (d) 6 ATP
Correct Answer:
3 ATP
Explanation:
No explanation available. Be the first to write the […]
The reaction of glycolysis occur in
Options
(a) mitochondria (b) cytoplasm (c) Golgi complex (d) ribosomes
Correct Answer:
cytoplasm
Explanation:
No explanation available. Be the first to write the explanation for this question […]
H₂O₂ reduces MnO₄⁻ ion to
Options
(a) Mn³⁺ (b) Mn²⁺ (c) Mn⁻ (d) Mn⁺
Correct Answer:
Mn²⁺
Explanation:
2MnO₄⁻ + 5H₂O₂ + 6H⁺ → 2Mn²⁺ + 8H₂O + 5O₂. Thus in this reaction, H₂O₂ […]
2017 Copyright Doctor Dreams Training Academy