Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
An autoimmune disease is
(c) It is a chronic progressive weakness of voluntary muscles especially that of eyes and
face.
Monoclonal antibodies are
(c) Monoclonal antibodies are identical molecules specific for one type of antigen. These are obtained by injecting the target antigen into a rat or mouse. Sometimes later, the spleen cells producing antibodies are isolated and fused with myeloma cells to produce monoclonal antibodies.
During an allergic reaction, the binding of antigens to IgE antibodies initiates a response, in which chemicals cause the dilation of blood vessels and a host of other physiological changes, such chemicals are
Histamine is released during allergic reactions. Histamine can occur in various tissues bit it is concentrated in connective tissue, it is formed from the amino acid histidine. It causes dilation and increases permeability of small blood vessels, which results in such symptoms as localise swelling, itching, sneezing and runny eyes and nose.
Which of the following statements is INCORRECT regarding the male reproductive system of a frog?
Vasa efferentia are 10-12 in number that arise from testes, not kidneys. They enter the kidneys on their side and open into Bidder’s canal.
In male frogs, the urinogenital duct directly communicates with which of the following structures to release both urine and sperms?
The urinogenital duct that comes out of the kidneys opens into the cloaca. The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms to the exterior.
What is the typical number of ova a mature female frog can lay at one time?
A mature female can lay 2500 to 3000 ova at a time.
Fertilisation in frogs is described as external. Where does this process typically take place?
Fertilisation is external and takes place in water.
Which of the following structures connect the testes to the kidneys in a male frog?
Male reproductive organs consist of a pair of yellowish ovoid testes, which are found adhered to the upper part of kidneys by a double fold of peritoneum called mesorchium.
Regarding the female reproductive system of a frog, which statement is correct?
The ovaries are situated near kidneys and there is no functional connection with kidneys. A pair of oviduct arising from the ovaries opens into the cloaca separately.
The cloaca in frogs serves as a common chamber for the passage of all the following EXCEPT:
The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms to the exterior. Bile is secreted by the liver.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.