What does the filiform apparatus do at the entrace into ovule?
What does the filiform apparatus do at the entrace into ovule?
Options
(a) It helps in the entry of pollen tube into a synergid (b) It prevents entry of more than one poller […]
Biology
Which of the following statements about Sporopollenin is correct?
Which of the following statements about Sporopollenin is correct?
Options
(a) Sporopollenin can withstand high temperatures but not strong acids (b) Sporopollenin can be degraded by enzymes (c) Sporopollenin is made up of […]
Which one of the following statements is not true about somatic embryogenesis?
Which one of the following statements is not true about somatic embryogenesis?
Options
(a) A somatic embryo develops from a somatic cell (b) The pattern of development of a somatic embryo is comparable […]
Which one of the following statements is correct? sporogenous tissue is haploid
Which one of the following statements is correct?
Options
(a) sporogenous tissue is haploid (b) Endothecium produces the microspores (c) Tapetum nourishes the developing pollen (d) Hard outer layer of pollen is called […]
Which one of the following pairs of plant structures has haploid number of chromosomes?
Which one of the following pairs of plant structures has haploid number of chromosomes?
Options
(a) Megaspore mother cell and antipodal cells (b) Egg cell and antipodal cells (c) Nucleus and antipodal cells […]
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because:
Options
(a) high energy bonds are formed in mitochondrial proteins. (b) ADP is pumped out of the matrix into […]
All enzymes of TCA cycle are located in the mitochondrial matrix except one
All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
Options
(a) isocitrate dehydrogenase […]
The overall goal of glycolysis, kerbs cycle and the electron transport system
The overall goal of glycolysis, kerbs cycle and the electron transport system is the formation of
Options
(a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise […]
Artificial insemination mean :
Artificial insemination mean :
Options
(a) Transfer of sperms of husband to a test tube containing ova (b) Artificial introduction of sperms of a healthy donor into the vagina (c) Introduction of sperms […]
One of the legal methods of birth control is :
One of the legal methods of birth control is :
Options
(a) by abstaining from coitus from day 10 to 17 of the menstrual cycle (b) by having coitus at the time of […]