Purines possess nitrogen at
Purines possess nitrogen at
Options
(a) 1,2,4 and 6 positions (b) 1,3,5 and 7 positions (c) 1,3,7 and 9 positions (d) 1,2,6 and 8 positions
Correct Answer:
1,3,7 and 9 positions
Explanation:
No […]
Questions
PSI and PSII was discovered by
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
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
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
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
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
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
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 membrane is made of
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
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 […]