Which of the following statements are correct regarding secretion of oxyntic cells?
(i) It denatures proteins and softens fibrous connective tissues In the blood.
(ii) It activates rennin.
(iii) it has a role in maturation of RBCs.
(iv) It activates trypsin.

Q. Identify the immunoglobulins (i), (ii), (iii) and (iv) and select the correct option.

(i) It is only antibody that can cross placenta and confer immunity to foetus.

(ii) It is mediator in allergic reactions and activates histamine secreting cells.

(iii) It is the one that first activates in an initial attack of antigen.

(iv) It has role in activating and suppressing lymphocyte activity.

Q. Which of the following statements is / are wrong with regard to active transport?
(i) Uses ATP energy to pump molecules
(ii) It works against concentration gradient
(iii) It is carried out by proteins present in the cytoplasmic fluid
(iv) Carrier proteins are non-specific in their function

Q. Identify true statements regarding IRON:-
(i) It is present in two amino acids - cysteine and methionine.
(ii) It is the main constituent of several coenzymes, vitamins.
(iii) It is required in a larger amount in comparison to other micronutrients.
(iv) It is an important constituent of proteins involved in the transfer of electrons.
(v) It is essential for the formation of chlorophyll.
(vi) It activates the catalase enzyme.

Q.

Consider the following statements (I-IV) regarding follicular fluid and select the option stating which ones are true (T) and false (F).

I. It provides nourishment for oocyte development.

II. It has a significant role in sperm development and fertilisation

III. It is a fluid present in the uterus.

IV. Follicular fluid is enriched with biomolecules.

Q.

Consider the following statements and choose the correct answer.

I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with the protein.

II. Different types of proteins present in the membrane play a major role in both active as well as passive transport.

III. The carrier proteins needed by facilitated and active transport are specific.

IV. There is no need of energy to pump molecule against a concentration gradient in active transport.

V. Transport rate reaches the saturation point when all the active proteins are used.