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(2) Correct – Antibodies are highly specific to the antigens they bind to, helping the immune system neutralize pathogens. (1) Antibodies are produced by B-cells, not T-cells. B-cells differentiate into plasma cells, which then secrete antibodies. (3) While B-cells are formed in the bone marrow, antibody production mainly occurs after their differentiation into plasma cells. (4) Antibodies do not function as enzymes in metabolic reactions; they mainly neutralize pathogens and mark them for destruction.
The average age of a father, mother, and daughter is 26 years. The average age of the mother and daughter is twice the age of the daughter. If the ages ...
Two years ago, the ages of A, B, and C were x−6x - 6, x+10x + 10, and x+14x + 14 years respectively. If the average of their current ages is 38 years,...
B is 2 years older than A and A is 5 years older than C. If the sum of the age of A and C is 25 years, then find the sum of the ages of all three.
5 years ago, A was 1/3 of B’s age. If the ratio of their present ages is 2:5, what will be the sum of their present ages?
The ratio of the present ages of father and his son is 9:4. The product of their ages 2 years ago was 34 times of his son’s age that year. What wa...
Reena is twice as old as Sunita .Three years ago, she was three times as old as Sunita. How old is Reena now?
Nine years ago, the ratio of ages of Raj and Vijay was 5:7, respectively. Four years hence, the ratio of ages of Sanjay and Vijay will be 2:3, respectiv...
Seven years ago, the sum of the ages of a mother and her daughter was 50 years. The ratio of their present ages is 3: 1. What is the present age of the...
The current age ratio of Riya to Renu is 4:7. In eight years, the combined age of Riya and Renu will total 93 years. What is Riya's current age?
Arjun is three years senior to Binny, who is twice as old as Chinu. If the average age of Arjun, Binny, and Chinu is 21 years, what is the age differenc...
