Zoology - Online Test
Q1. The strand of DNA that forms mRNA is called
Answer : Option D
Explaination / Solution:
During transcription, only one of the two DNA strands is copied. This is called the template strand because it acts as a template for the mRNA that is being assembled by the ribosomes. The sequence of the mRNA is complementary to the sequence of the template strand.
It is also known as sense strand.
Q2. Which of the following pair of factors are considered favourable for the formation of oxyhaemoglobin?
Answer : Option C
Explaination / Solution:
In the alveoli, where there is high , low , lesser concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin.
Q3. Which one is an alternate source of proteins for animals and human nutrition?
Answer : Option A
Explaination / Solution:
Alternate source of proteins for animals and human nutrition is single cell protein. Microbes are grown on industrial scale as source of good protein. Microbes like Spirulina on waste water of potato processing plants.
Q4. Species which suffered a near-extinction from ingesting the carrion of diclofenac-treated cattle is/are:
Answer : Option D
Explaination / Solution:
These include the Asiatic lion, the Bengal tiger, the snow leopard and the Indian white-rumped vulture, which, by ingesting the carrion of diclofenac-laced cattle, nearly went extinct.
Q5. A dwarf person showing stunted growth and mental retardation both, is a result of hyposecretion of
Answer : Option A
Explaination / Solution:
Hypothyroidism causes defective development and maturation of the growing baby leading to stunted growth (cretinism), mental retardation, low intelligence quotient, abnormal skin, deaf-mutism, etc.
Q6. The largest phylum of kingdom animalia is
Answer : Option C
Explaination / Solution:
This is the largest phylumof Animalia which includes insects.
Q7. Each testis has about 250 compartment called as
Answer : Option D
Explaination / Solution:
Each testis contains about 250 compartments called testicular lobules. Each testicular lobule contains one to three highly coiled seminiferous tubules that produce sperms.
Q8. Lipids that are found in the cell membrane are
Answer : Option C
Explaination / Solution:
Some lipids have phosphorous and a phosphorylated organic compound in them. These are phospholipids. They are found in cell membrane.
Q9.
Which of the following statements doesn’t hold true for blood clotting cascade?
i. Ruptured platelets release thromboplastin.
ii. Prothrombinis converted into thrombin in the presence of vitamin K and Na+ions.
iii. Fibrinogen is converted into fibrin through enzymatic action of thrombin in the presence of Ca++ions
iv. Fibrin makes clot via process of polymerisation.
Answer : Option B
Explaination / Solution:
Ruptured platelets release thromboplastin. Fibrinogen present in blood plasma is converted into fibrin through enzymatic action of thrombin. Fibrin makes clot via process of polymerisation.
Q10. The chemical substances produced by some microbes and can kill or retard the growth of disease causing microbes are called
Answer : Option A
Explaination / Solution:
Antibiotics, also called antibacterials, are a type of antimicrobial drug used in the treatment and prevention of bacterial infections.They may either kill or inhibit the growth of bacteria.
