Zoology - Online Test
Q1. Rop genes in pBR322 codes for
Answer : Option A
Explaination / Solution:
The plasmid pBR322 contains a Rop gene coding for the Rop protein, which promotes conversion of the unstable RNA I – RNA II complex to a stable complex.
Rop genes in pBR322 codes for protein involved in replication of plasmid. Plasmid are able to take the foreign gene and to be transferred to target cells.
Q2.
Read the following :
i. Infants and toddlers are often under habit of bed wetting since micturition is a reflex process.
ii. Adults and grown up children can control this reflex process, voluntarily to some extent.
Answer : Option C
Explaination / Solution:
The process of release of urine is called micturition and the neural mechanism causing it is called the micturition reflex. Adults and grown up children can control the reflex process of micturition voluntarily to some extent.
Q3. The diagram represents Miller experiment. Choose the correct combination of labeling.
Answer : Option D
Explaination / Solution:
In Urey and Miller experiment the set up labeled as A – electrodes, B – (NH3 + H2 + H2O + CH4), C – cold water, D – Vacuum, E – U Trap.
Q4. The basic unit of classification is
Answer : Option B
Explaination / Solution:
The basic unit of classification is species. Species are population of organisms that can inter breed among themselves to produce new organisms.
Q5. The individual transitional communities to inhabit an area are commonly called as:
Answer : Option C
Explaination / Solution:
A seral community (or sere) is an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community. In many cases more than one seral stage evolves until climax conditions are attained. seral communities leads to climax communities.
Q6. The following X-ray shows :
Answer : Option A
Explaination / Solution:
The X-ray of knee shows gout in the knee. Gout is a kind of arthritis. It can cause an attack of sudden burning pain, stiffness and swelling in joint.
Q7. How many documented varieties of Basmati rice are grown in India?
Answer : Option C
Explaination / Solution:
Basmati rice is distinct for its unique aroma and flavour and 27 documented varieties of Basmati are grown in India.
India grows 650.000 tonnes of Basmati annually.
Q8. Which period of menstrual cycle is called risky period of conception?
Answer : Option B
Explaination / Solution:
10th to 17th day of menstrual cycle is called risky period of conception as during which ovulation takes. If sexual intercourse occurs during this period, there is a very high chance of fertilisation that may leads to pregnancy.
Q9. Nissl granules in a nerve cell are now identified as
Answer : Option D
Explaination / Solution:
The nissl granules in nerve cell are now identified as ribosomes after discovery of electron microscope that provides highly magnified image for detailed study.
Q10. In fungus, food reserves is
Answer : Option D
Explaination / Solution:
In fungus, the food reserve is glycogen and fat. Different fungi contain different kinds of reserve food materials depending upon habitat and body structure of fungus.4
