Biology - Online Test
Q1. The largest phylum of kingdom animalia is
Answer : Option C
Explaination / Solution:
This is the largest phylumof Animalia which includes insects.
Q2. 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.
Q3. 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.
Q4. Chromosome theory of inheritance was proposed by
Answer : Option B
Explaination / Solution:
Walter Sutton and Theodor Boveri are credited with developing the Chromosomal Theory of Inheritance, which states that chromosomes carry the unit of heredity (genes) in 1902.
Q5.
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.
Q6. At the end of citric acid cycle, most of the energy is transferred to
Answer : Option D
Explaination / Solution:
Citric acid cycle or start with pyruvate and leads to complete oxidation of glucose to carbon dioxide and energy in form of ATP, NADH and .
At end of citric acid cycle, most of the energy is transferred to NADH and .
Q7. 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.
Q8. All are biofuels except
Answer : Option D
Explaination / Solution:
Biopetrol is fuel having characteristic similar to petrol but is produced from palmitic acid. So, it is not a biofuel. Biodiesel, marsh gas and ethanol are biofuels produced by action of microbes.
Q9. A plant in which adventitious roots develop chlorophyll and perform photosynthesis is
Answer : Option C
Explaination / Solution:
Tinospora develops adventitious roots having chlorophyll and perform photosynthesis. This kind of roots develops from stems andhang in air.
Q10. Dinoflagellates possess condensed chromosomes even in interphase, their nucleus is called
Answer : Option B
Explaination / Solution:
Dinoflagellates are unicellular protists. They possess condensed chromosomes even during interphase. Their nucleus is called as mesokaryon.
