PS-I and PS-II was discovered by
Options
(a) Robert Emerson (b) Arnon (c) Blackman (d) Robert Mayer
Correct Answer:
Robert Emerson
Explanation:
Robert Emerson discovered the photosystem-I (PS-I) and photosystem-II(PS-II).
Prolonged deficiency of nicotinic acid causes
Options
(a) osteomalacia (b) pellagra (c) anaemia (d) xerophthalmia
Correct Answer:
pellagra
Explanation:
The nicotinic acid or niacin (vitamin B₃) is required for co-enzymes NAD and NADP […]
Prokaryotic ribosomes has sedimentation coefficient of
Options
(a) 80S (b) 70S (c) 40S (d) 60S
Correct Answer:
70S
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Prokaryotic flagella are having
Options
(a) unit membrane – enclosed fibre (b) helically arranged protein molecule (c) micro tubular 9+2 membrane enclosed structure (d) protein membrane enclosed fibre
Correct Answer:
helically arranged protein […]
Power house of the cell is
Options
(a) Golgi body (b) mitochondrian (c) ribosome (d) endoplasmic reticulum
Correct Answer:
mitochondrian
Explanation:
No explanation available. Be the first to write the explanation for this […]
Polyribosomes are aggregates of
Options
(a) ribosomes and RNA (b) only RNA (c) peroxisomes (d) several ribosomes held together
Correct Answer:
several ribosomes held together
Explanation:
No explanation available. Be the first to […]
Pneumatophores occur in
Options
(a) Submerged hydrophytes (b) Carnivorous plants (c) Free-floating hydrophytes (d) Halophytes
Correct Answer:
Halophytes
Explanation:
Halophytes like mangrooves have pneumatophores.Apogeotropic (–vely geotropic) roots having lenticels called pneumathodes to uptake […]
Plasma mambrane is made of
Options
(a) proteins and carbohydrates (b) proteins and lipids (c) proteins,lipids and carbohydrates (d) proteins, some nuclei acid and lipids
Correct Answer:
proteins,lipids and carbohydrates
Explanation:
No explanation […]
Plants obtain carbon and most of their oxygen from
Options
(a) soil (b) symbiotic association (c) CO₂ from the atmosphere (d) water
Correct Answer:
CO₂ from the atmosphere
Explanation:
Plants obtain most of […]
Plants having little or no secondary growth are
Options
(a) Cycads (b) Conifers (c) Deciduous angiosperms (d) Grasses
Correct Answer:
Grasses
Explanation:
Grasses are monocots and monocots usually do not have secondary growth.Palm […]
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