Q1. Father of Biology is—
(a) De Candolle
Q2. For entry in gene pool, a mutation occur in—
(a) Somatic cells
(b) Germplasm DNA
(c) Plasma proteins
(d) None of these
Q3. Vessels differ from tracheids—
(a) In being living
(b) In being derived from a single cell
(c) vessels have perforations at the end plates which make them a tube-like, long structure while tracheids do not have end plates.
(d) Because they conduct water
Q4. Which one is not a nut ?
(b) Cashew nut
(d) None of these
Q5. Which has maximum calorific value?
Q6. Function of leghemoglobin in nitrogen fixation
(a) Absorption of oxygen
(b) Absorption of carbon dioxide
(c) Absorption of light
(d) All of the above
Q7. Which one of the following disease caused by bacteria-
(c) Small pox
(d) All of these
Q8. The age of trees is estimated by which of the following?
(a) their heights
(b) their weights
(c) counting the number of annual rings
(d) their elongation of roots
Q9. Due to bite of mad dog the disease hydrophobia is caused by-
(a) Rabies virus
(c) Polio virus
Q10. The hormone insulin is a—
(b) fatty acid
Sol.A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.The mutation occurs in a person’s egg or sperm cell but is not present in any of the person’s other cells
SOl.These non-living cells are elongated with lignified cell walls. The main difference between tracheids and vessels is that vessels have perforations at the end plates which make them a tube-like, long structure while tracheids do not have end plates
Sol.The total energy value of a food product results from the addition of the energy content of each nutrient components. These are defined as follows:
1 g fat 37 kJ: (9 kcal)
1 g carbohydrates: 17 kJ (4 kcal)
1 g protein : 17 kJ (4 kcal)
1 g alcohol (ethanol) 29 kJ (7 kcal)
Sol.Leghaemoglobin (also leghemoglobin or legoglobin) is an oxygen carrier and hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. Leghemoglobin buffers the concentration of free oxygen in the cytoplasm of infected plant cells to ensure the proper function of root nodules.
Sol.Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis.
Sol.when the tree is cut, the layers appear as alternating rings of light and dark wood. Click the cross section of the tree ring above to view the whole ring as it came from the tree. Count the dark rings, and you know the tree’s age
Sol.Insulin is a protein chain or peptide hormone. There are 51 amino acids in an insulin molecule. It has a molecular weight of 5808 Da. Insulin is produced in the islets of Langerhans in the pancreas