Zoology - Online Test
Q1. Cytoskeleton is made of
Answer : Option D
Explaination / Solution:
An elaborate network of filamentous proteinaceous structures present in the cytoplasm is collectively referred to as the cytoskeleton.
Q2. During translation initiation in prokaryotes, a GTP molecule is needed in
Answer : Option A
Explaination / Solution:
During translation initiation in prokaryotes, a GTP molecule is required along with 30S ribosome, m-RNA with formyl-met-t-RNA. GTP provides energy and ribosomes provide site for translation.
Q3. In CNS, regulation of respiratory rhythm during normal breathing is largely dependent upon :
Answer : Option D
Explaination / Solution:
In central nervous system, regulation of respiratory rhythm during normal breathing is dependent upon concentration of carbon dioxide gas in air.
Q4. For converting an inferior local breed into superior breed, cross breeding with the same types of superior bull is required for
Answer : Option B
Explaination / Solution:
Local inferior breed of cow is changed into superior breed by Hybridisation methods. In this method superior bull is required to breed for 6-7 generations to get desired traits.
Q5. Sanctuaries, national parks & biosphere reserves are examples of :
Answer : Option D
Explaination / Solution:
In situ conservation is the conservation of organisms in their natural geographic regions by providing protection from poaching, cutting or other similar activities. In sanctuaries, national parks and biosphere reserves organisms are kept in natural habitat.
Q6. Which of the following gas is found to work as a second messenger?
Answer : Option A
Explaination / Solution:
Second messengers are molecules that relay signals received at receptors on the cell surface to trigger physiological changes. Nitrogen oxide (NO) acts as second messenger.
Q7. In which of the organism, internal fertilisation is seen?
Answer : Option C
Explaination / Solution:
Most of the animals are not able to fertilize its own egg by sperms but in liver fluke, self-fertilization takes place. Earthworm also possess both male and female reproductive organ in same individual but not able to fertilize its own egg.
Q8. The vagina connects the
Answer : Option A
Explaination / Solution:
The vagina is a elastic, muscular tube that connects the cervix of the uterus to the exterior of the body. It is located inferior to uterus and posterior of the urinary bladder.
Q9. A polysaccharide present as storehouse of energy of plant tissues
Answer : Option B
Explaination / Solution:
Starch is a variant of this but present as a store house of energy in plant tissues.
Q10. The discovery that led to development of first antibiotic was made by
Answer : Option C
Explaination / Solution:
The discovery of first antibiotic was related to A.Flemming observations about the secretion of some chemicals from Penicillium notatum that prohibited the growth of bacteria.
