Zoology - Online Test
Q1. Astral body are formed of
Answer : Option C
Explaination / Solution:
Astral body are formed of microtubules. Astral bodies are produced by centriolar division proir to start of during cell division and attach with centromere of the chromosome during.
Q2. How is extinction represented in a tree diagram?
Answer : Option B
Explaination / Solution:
In a tree diagram, the extinction is represented as a branch ends that further do not divide any more. Extinction may be due to changed climatic condition or loss of ecological niche.
Q3. Which of the following is a living fossil?
Answer : Option D
Explaination / Solution:
Cycas, a gymnosperm is called the living fossil because they have been evolved in Jurassic period and still survive in present climatic condition.
Q4. Living organisms are classified because of
Answer : Option C
Explaination / Solution:
Living organisms are classified according to certain criteria for easy identification and study of organism. As the number of organisms are very large, it is not possible to study about each and every organism without classification.
Q5. Which one is not a natural methods birth control
Answer : Option C
Explaination / Solution:
Tubectomy is not a natural method of birth control. In tubectomy method fallopian tube of female is cut and tide to prevent ovulation. To abstain, coitus interrupts and rhythm period is natural method of birth control.
Q6. The correct order of digestive system of frog is
Answer : Option A
Explaination / Solution:
The digestive system of frog begins from the mouth which opens into the buccal cavity that leads to the oesophagus through pharynx. Oesophagus is a short tube that opens into the stomach which in turn continues as the intestine and then rectum. The rectum finally opens outside by the cloaca through cloacal aperture.
Q7. The three domains system do not includes
Answer : Option A
Explaination / Solution:
Three kingdom or domain system of classification do not includes viral domain. Virus were discovered after invention of electron microscope so, they were not the part of living world.
Q8.
Read the following statements about CCK :
i. this hormone stimulates gastrointestinal motility and pancreatic endocrine function.
ii. this hormone stimulates release of bile from gall bladder.
Answer : Option D
Explaination / Solution:
Cholecystokinin, previously called pancreozymin, is synthesized and secreted by enteroendocrine cells in the duodenum, the first segment of the small intestine.
Its presence causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively, and also acts as a hunger suppressant.
Q9. Fevicol is a synthetic sticky substance insoluble in water. It is a type of…
Answer : Option C
Explaination / Solution:
Fevicol is a synthetic sticky substance insoluble in water and used for joining wood and paper is a type of resins.
Q10. During protein synthesis, AUG functions as the initiator codon in mRNA. What should be the anticodon on the t-RNA molecule that picks up and brings the amino acid specified by this codon?
Answer : Option A
Explaination / Solution:
The anticodon on the t-RNA corresponding to AUG initiator codon on mRNA is UAC as A bonds with U and G bonds with C in RNA. Thymine (T) is absent in RNA.
