Biology - Online Test
Q1. In T. H. Morgan"s Experiment on Drosophilia what will be the result when F1 female flies are crossed with double recessive male files?
Answer : Option A
Explaination / Solution:
When F1 female flies (Drosophila) obtained in crossed with double recessive male flies 83% parental combination are obtained along with 17% recombinant offspring are formed.
Q2. Glycolysis is conversion of
Answer : Option D
Explaination / Solution:
Glycolysis is the metabolic pathway that converts glucose C6H12O6, into pyruvate, CH3COCOO− + H+.
The free energy released in this process is used to form the high-energy molecules ATP (adenosine triphosphate) and NADH (reduced nicotinamide adenine dinucleotide).
Q3. The statement incorrect about human heart is :
Answer : Option D
Explaination / Solution:
Human being is triploblastic. The different organs are evolved from different layers of foetus. Human heart is derived from mesoderm.
Q4. Spirulina is a
Answer : Option C
Explaination / Solution:
Spirulina is an Algae found in water. It is unicellular and rich in proteins. It is used as single cell protein as substitute of plant or animal protein.
Q5. Water bodies and aquatic flora will be badly affected by :
Answer : Option D
Explaination / Solution:
Acid rain is the rainwater that contain Sulphuric acid and Nitric acid. These acids make the water bodies acidic by changing pH. At higher pH aquatic organisms are badly affected.
Q6. Parallel venation is present in
Answer : Option D
Explaination / Solution:
Parallel venation is the characteristic features of monocots. Dicots possesses reticulate venation. The arrangementof veins on leaf is called venation.
Q7. Identify “A” and “B” in the T.S of mature anther
Answer : Option D
Explaination / Solution:
The mature anther consists of four microsporangia which contain four layers. The inner most layer is called tapetum that provide nutrient to growing microspores and tissues inside it are called microspore mother cell that produce pollen grain.
Q8. Various phases of cell cycle are controlled by proteins
Answer : Option C
Explaination / Solution:
Cycline and CDKs can modify various protein substrates involved in cell cycle progression. Cancer results due to mutations of these proteins leading to uncontrolled cell divisions.
Q9. DNA is extracted by
Answer : Option C
Explaination / Solution:
The piece of DNA obtained by gel electrophoresis contains agrose gel also. Ethanol precipitation is a commonly used technique for concentrating and de-salting nucleic acids (DNA or RNA) preparations in aqueous solution. The basic procedure is that salt and ethanol are added to the aqueous solution, which forces the precipitation of nucleic acids out of solution.
Q10. Which of the following is not a part of glomerular filtrate?
Answer : Option A
Explaination / Solution:
Glomerular filtrate contains glucose, inorganic salts and creatinine but it do not contain globulins protein.
