Zoology - Online Test
Q1. The cardiovascular centre is located in :
Answer : Option A
Explaination / Solution:
The cardiovascular centre is a part of the human brain responsible for the regulation of the rate at which the heart beats through the nervous and endocrine systems. It is found in the medulla oblongata.
Q2. Bioremediation of Phenol, one of the most common environmental pollutants is reported to be assisted by :
Answer : Option A
Explaination / Solution:
Bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants. Bioremediation of phenol is carried out using earthworms and bacteria.
Q3. Chromosome appeared beaded during
Answer : Option A
Explaination / Solution:
Chromosome appeared beaded during leptotene stage of prophase of meiosis I due to the distinct appearance of nucleosomes. Chromatin materials start condensing after that stage.
Q4. During agarose gel electrophoresis DNA fragments moves towards anode. This is because
Answer : Option B
Explaination / Solution:
To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied. The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode.
Q5. In the following pictorial representation of Kreb’s Hensleit cycle, find out 1,2& 3 ?
Answer : Option B
Explaination / Solution:
Kreb’s Hensleit cycle is the sequence of chemical reaction occurring primarily in the liver that results in the production of urea. In this cycle ammonia is fist converted into citrulline along with carbon dioxide that change into arginine and finally into ornithine.
Q6. Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter
Answer : Option D
Explaination / Solution:
Simplest organisms could not have originated spontaneously from non-living matter. This can be shown as meat was not spoiled when heated and kept sealed in vessels.
Q7. A group of closely related classes is called
Answer : Option C
Explaination / Solution:
Genus comprises a group of related species, Family has a group of related genera, order has a group of related family. Hence, the correct option is Phylum.
Q8. Which of the following represents an incorrect feature of ecological succession:
Answer : Option A
Explaination / Solution:
Ecological succession gradually results into gradual increase in the biomass as new species having complex plant body replace the older species. Thus, the biomass increase at each stage of succession.
Q9. Read the following :
i. The synovial joints ischaracterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
ii. Saddle is a type of synovial joint
i. The synovial joints ischaracterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
ii. Saddle is a type of synovial joint
Answer : Option A
Explaination / Solution:
Synovial joints are characterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones.
A saddle joint is a synovial joint where one of the bones forming the joint is shaped like a saddle with the other bone resting on it like a rider on a horse. Saddle joint (between carpal and metacarpal of thumb)
Q10. Biopiracy is
Answer : Option A
Explaination / Solution:
Biopiracy describes a practice in which indigenous knowledge of nature, originating with indigenous peoples, is used by others for profit, without permission from and with little or no compensation or recognition to the indigenous people themselves.
