Flagellated male gametes are present in all the three of which one of the following sets?
Options
(a) Zygnema, Saprolegnia and Hydrilla (b) Fucus, Marsilea and Calotropis (c) Riccia, Dryopteris and Cycas (d) […]
Which one of the following is not an essential mineral element for plants while the remaining three are?
Options
(a) Iron (b) Manganese (c) Cadmium (d) Phosphorus
Correct Answer:
Cadmium
Explanation:
Cadmium is […]
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
Options
(a) Xenogamy (b) Geitonogamy (c) Karyogamy (d) Autogamy
Correct Answer:
Geitonogamy
Explanation:
Geitonogamy […]
The complex formed by a pair of synapsed homologous chromosomes is called
Options
(a) Kinetochore (b) Bivalent (c) Axoneme (d) Equatorial plate
Correct Answer:
Bivalent
Explanation:
During zygotene, second stage of meiosis I homologous […]
In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube?
Options
(a) Embryo only, upto 8 cell stage (b) Either zygote or early embryo […]
In leaves of C₄ plants malic acid synthesis during CO₂ fixation occurs in
Options
(a) epidermal cells (b) mesophyll cells (c) bundle sheath (d) Guard cells
Correct Answer:
mesophyll cells
Explanation:
In leaves of […]
Which one of the following structures is an organelle within an organelle?
Options
(a) Ribosome (b) Peroxisome (c) ER (d) Mesosome
Correct Answer:
Ribosome
Explanation:
Ribosome are small naked (non membrane bound) particles made […]
Which one of the following pairs is wrongly matched?
Options
(a) Alcohol – nitrogenase (b) Fruit juice – pectinase (c) Textile – amylase (d) Detergents – lipase
Correct Answer:
Alcohol – nitrogenase
Explanation: […]
Which of the following criteria does not pertain to fecilitated transport?
Options
(a) High selectively (b) Transport saturation (c) Uphill transport (d) Requirement of special membrane proteins
Correct Answer:
Uphill transport
Explanation:
Substances […]
Toxic agents present in food which interfere with thyroxine synthesis lead to the development of:
Options
(a) toxic goitre (b) cretinism (c) simple goitre (d) thyrotoxicosis
Correct Answer:
simple goitre
Explanation:
Goitre is […]
2017 Copyright Doctor Dreams Training Academy