Class 12 Biology Chapter 1 MCQ for NEET. We covered all the Class 12 Biology Chapter 1 MCQ for NEET in this post for free so that you can practice well for the exam.
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MCQ on Class 12 Biology for NEET Students
Which one of the following statements is correct with respect to AIDS?
(A) HIV can be transmitted through eating food together with an infected person.
(B) Drug addicts are the least susceptible to HIV infection.
(C) AIDS patients are being cured cent percent with proper care and nutrition.
(D) The causative HIV retrovirus enters helper T-lymphocytes, thus reducing their numbers
Option d – The causative HIV retrovirus enters helper T-lymphocytes, thus reducing their numbers
RNA interference which is employed in making tobacco plants resistant to Meloidogyne incognita is essentially involved in ………
(A) preventing the process of translation of mRNA
(B) preventing the process of transcription
(C) preventing the process of replication of DNA
(D) preventing the process of splicing of hnRNA
Option a – preventing the process of translation of mRNA
Metameric segmentation is the characteristic of
(A) Echinodermata and Annelida
(B) Annelida and Arthropoda
(C) Mollusca and Chordata
(D) Platyhelminthes and Arthropoda
Option b – Annelida and Arthropoda
The transition state structure of the substrate formed during an enzymatic reaction is
(A) transient but stable
(B) permanent but unstable
(C) transient and unstable
(D) permanent and stable
Option c – transient and unstable
What is common among amylase, rennin, and trypsin?
(A) These all are proteins.
(B) These all are proteolytic enzymes.
(C) These are produced in the stomach.
(D) These act at a pH lower than 7.
Option a – These all are proteins.
Frog excretes ……. whereas tadpole excretes ………
(A) Ammonia, Urea
(B) Urea, Ammonia
(C) Urea, Uric acid
(D) Uric acid, Ammonia
Option b – Urea, Ammonia
The sarcomere is the functional unit of contraction in a muscle fiber. Identify the portion of myofibril that constitutes a sarcomere.
(A) The portion of myofibril between two successive ‘A’ bands.
(B) The portion of myofibril between two successive ‘Z’ bands.
(C) The portion of myofibril between two successive ‘M’ bands.
(D) The portion of myofibril between two successive ‘I’ bands.
Option b – The portion of myofibril between two successive ‘Z’ bands.
What is NOT true about the purpose of vaccination?
(A) It prevents the entry of pathogenic germs into the body.
(B) It increases the level of resistance of the body by increasing the quantum of specific antibodies.
(C) With secondary infection, there is a prompt spurt of the production of specific antibodies.
(D) Even with a second attack, the virulence of the disease is lowered very much.
Option a – It prevents the entry of pathogenic germs into the body.
Select the mismatched pair from the following
(A) Oxytocin – Contraction of uterine muscles
(B) Insulin – Gluconeogenesis
(C) Prolactin – Milk production in mammary glands
(D) Glucagon – Glycogenolysis
Option b – Insulin – Gluconeogenesis
The purplish red pigment rhodopsin contained in the rods type of photoreceptor cell of the human eyes is a derivative of
(A) vitamin C
(B) vitamin D
(C) vitamin A
(D) vitamin B
Option c – vitamin A
The hormones involved in maintaining calcium balance in the human body are
(A) PTH and TCT
(B) PTH and LTH
(C) TCT and FSH
(D) MSH and ACTH
Option a – PTH and TCT
The signals for the parturition process originate from
(A) muscles of the uterus
(B) a fully developed foetus and placenta
(C) the placenta
(D) hormones of the ovaries and uterus
Option b – a fully developed foetus and placenta
Genetic drift describes
(A) the change in frequency of a gene merely by chance in a small population.
(B) the change in frequency of a gene that occurs merely by selection.
(C) the change in frequency of a gene that occurs merely by selection and chance.
(D) the change in frequency of a gene that does not influence it to any extent.
Option a – the change in frequency of a gene merely by chance in a small population.
According to Medical Termination Amendment Act, 2017 i. Pregnancy can be terminated on certain grounds, within the first 12 weeks the opinion of pregnancy on one medical practitioner. ii. MTP can be done if the continuation would of pregnancy involves risk to the life of the pregnant woman. MTP can be carried out even after 30 weeks of pregnancy. iv. Medical termination of pregnancy is not allowed even if it is harmful to the mother due to the ethical, and moral issues involved in it.
(A) i and ii are correct.
(B) ii and iv are correct.
(C) i and iv are incorrect.
(D) ii and iii are incorrect.
Option a – i and ii are correct.
Medical termination of pregnancy (MTP) is considered safe up to how many weeks of pregnancy?
(A) Six weeks
(B) Eight weeks
(C) Twelve weeks
(D) Eighteen week
Option c – Twelve weeks
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