Zoology - Online Test
Q1. Old people usually exhibit weaker immune power due to degeneration of
Answer : Option B
Explaination / Solution:
Thymus gland produces a hormone called thymosin which stimulates the T-cells. T-cells help in producing antibodies in the bodies. In older people weaker immune power is due to degeneration of thymus gland.
Q2. Interacting members of species live close to each other in following interaction/s:
Answer : Option A
Explaination / Solution:
Individual organisms live together in an ecosystem and depend on one another. In fact, they have many different types of interactions with each other, and many of these interactions are critical for their survival.
Interacting members of species live close to each other in commensalism, predation and parasitism.
Q3. The bile duct and the pancreatic duct open together into the duodenum as
Answer : Option A
Explaination / Solution:
The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct which is guarded by a sphincter called the sphincter of Oddi.
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Q4. Post erythrocytic part of life cycle of plasmodium is called
Answer : Option D
Explaination / Solution:
The post erythrocytic part of life cycle of plasmodium is called Ross cycle. This cycle is named after the scientist Ronald Ross, who discovered the cycle of malarial causing protozoa, plasmodium.
Q5.
In the following figure a synapse is shown :
i & ii (from up to down)
1) (i) is presynaptic membrane and (ii) is postsynaptic membrane.
2) synaptic vesicles are in postsynaptic knob.
3) neurotransmitter receptors are located on postsynaptic membrane.
Answer : Option C
Explaination / Solution:
The synapse is formed by the membranes of apre-synaptic neuron and a post-synaptic neuron, which may or may notbe separated by a gap called synaptic cleft. The neurotransmitter receptors are located on postsynaptic membrane.
Q6. Each centriole is surrounded by dense amorphous protoplasmic masses called
Answer : Option B
Explaination / Solution:
All animal cell have two small organelles called centrioles. Each centriole is surrounded by dense amorphous protoplasmic masses called Massules.
Q7. Which of the following is structural subunit of DNA?
Answer : Option A
Explaination / Solution:
Consisting of a five-carbon sugar (deoxyribose) a phosphate group and a nitrogenous base, a nucleotide links with another nucleotides in a repeating sequence, forming a very long, continuous strand of DNA.
The nitrogenous base will be one of four types: Guanine(G), Adenine (A), Cytosine (C) or Thymine (T).
Q8. Organism/s living as both producer as well as consumer is/are
Answer : Option A
Explaination / Solution:
Nepenthes (pitcher plant) and Drocera are insectivores plants to compensate their protein requirement. They have green leaves that perform photosynthesis process. So, they act as both producer as well as consumer.
Q9. Match the following:
respiratory volume
a) RV
b) ERV
c) TV
d)IRV
value (in ml)
i) 1000 - 1100
ii) 6000 - 8000
iii) 2500 - 3000
iv) 1100 - 1200
respiratory volume
a) RV
b) ERV
c) TV
d)IRV
value (in ml)
i) 1000 - 1100
ii) 6000 - 8000
iii) 2500 - 3000
iv) 1100 - 1200
Answer : Option D
Explaination / Solution:
TV isapprox. 500 mL., i.e., a healthy man caninspire or expire approximately 6000 to 8000mL of air per minute. IRV averages 2500mL to 3000 mL.ERV averages 1000mL to 1100 mL. RV averages 1100 mL to 1200 mL.
Q10. Main objective of production or use of herbicide resistant genetically modified crops is to
Answer : Option A
Explaination / Solution:
Herbicides are chemicals that kill the herbs that grow with crop plants. Use of herbicides results into accumulation of herbicide in food and water. To overcome this problem herbicide resistant genetically modified crops are used.
