Zoology - Online Test
Q1. Sneha ceased to get smell of a perfume applied to her clothes but her friend Reema who passed by complimented her for the noticeable fragrance. This is an example of :
Answer : Option C
Explaination / Solution:
The sensory organs detect all types of changes in the environment and send appropriate signals to the CNS, where all the inputs are processed and analysed.
Q2. The eukaryotic ribosomes are of
Answer : Option D
Explaination / Solution:
The eukaryotic ribosomes are 80S while the prokaryotic ribosomes are 70S. Here ‘S’ stands for the sedimentation coefficient; it indirectly is a measure of density and size.
Q3. Protein synthesis occurs over
Answer : Option B
Explaination / Solution:
Protein synthesis occurs over ribosomes which are also called protein factories of cell. Each ribosomes have two parts 40S and 60S in eukaryotes and 30S and 50S in prokaryotes.
Q4.
Read the following statements :
i. The affinity of Hb for CO is 200 to 250 times more than its affinity for oxygen therefore CO competes with oxygen for binding to Hb.
ii. The result of this binding are a shift of oxygen-hemoglobin dissociation curve to the left and its alteration to a more hyperbolic shape.
Answer : Option C
Explaination / Solution:
The affinity of Haemoglobin is 200 to 250 times more than that of Oxygen, therefore, CO competes with Oxygen for binding to Hb. Due to this binding a shift of oxygen-hemoglobin dissociation curve to left and its alteration to a more hyperbolic shape.
Q5. Norin-10 gene is famous for
Answer : Option B
Explaination / Solution:
Norin-10 gene is used to obtain dwarf varieties of crops like rice and wheat. This gene is introduced in crop plants by using technique of genetic engineering.
Q6. Surveys and statistical studies have reported that endemic species show
Answer : Option B
Explaination / Solution:
Endemic species are plants and animals that exist only in one geographic region. Species can be endemic to large or small areas of the earth
Endemic species of an ecological region try to maintain same genetic makeup. These species are well suited in particular habitat and shows very less variation in comparison to other species.
Q7. The Prolactin inhibiting neurohormone is :
Answer : Option C
Explaination / Solution:
The Prolactin inhibiting neurohormone is dopamine. Dopamine is a neurotransmitter that helps control the brain’s reward and pleasure centers.
Q8. What is common among Liver fluke, Planarians and Tape worm?
Answer : Option B
Explaination / Solution:
All of them belong to Phylum Platyhelminthes and hence have dorso-ventrally flattened body and so, are called flatworms.
Q9. A network of tubules present inside the testis to store the sperm is called
Answer : Option C
Explaination / Solution:
Seminiferous tubules of testis open into the vasa efferentia through rete testis. Rete testis is network of tubules inside the testis to store the sperm temporarily.
Q10. No cell could live without
Answer : Option B
Explaination / Solution:
Enzymes are bio-catalyst. All the metabolic biochemical reactions are carried out with the help of enzyme. No cell could survive without enzyme.
