Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Insulin consists of two short polypeptide chains. What are these chains called, and how are they linked?
The NCERT states: 'Insulin consists of two short polypeptide chains: chain A and chain B, that are linked together by disulphide bridges (Figure 10.3).'
Which characteristic of genetically engineered insulin ensures it is identical to natural human insulin?
The NCERT states: 'Human insulin is made in bacteria yet its structure is absolutely identical to that of the natural molecule.' This identity is achieved by using the precise genetic code for human insulin, as Eli Lilly 'prepared two DNA sequences corresponding to A and B, chains of human insulin'.
How many recombinant therapeutics have been approved for human use worldwide?
The NCERT states: 'At present, about 30 recombinant therapeutics have been approved for human-use the world over.'
In humans, where is insulin primarily synthesized, and what specific cells are responsible for its secretion?
The NCERT states in the CHEMICAL_COORDINATION_AND_INTEGRATION chapter: 'The two main types of cells in the Islet of Langerhans are called $\alpha$-cells and $\beta$-cells. The $\alpha$-cells secrete a hormone called glucagon, while the $\beta$-cells secrete insulin.'
Which of the following describes the functional unit of the human kidney?
The NCERT text states: 'Each kidney has over a million tubular structures called nephrons. Nephron is the functional unit of kidney and has two portions – glomerulus and renal tubule.'
The Malpighian body or renal corpuscle is formed by which two structures?
According to the NCERT text: 'Glomerulus alongwith Bowman’s capsule, is called the malpighian body or renal corpuscle.'
What is the primary function of the Proximal Convoluted Tubule (PCT)?
The NCERT text states: 'Proximal Convoluted Tubule (PCT): ... Nearly all of the essential nutrients, and 70-80 per cent of electrolytes and water are reabsorbed by this segment.'
In which part of the nephron does filtration of blood primarily occur to form the glomerular filtrate?
The NCERT text mentions: 'Filtration is a non-selective process performed by the glomerulus using the glomerular capillary blood pressure.'
A healthy individual's Glomerular Filtration Rate (GFR) is approximately:
The NCERT text states: 'GFR in a healthy individual is approximately 125 ml/minute, i.e., 180 litres per day!'
Which of the following substances are reabsorbed actively in the renal tubules?
The NCERT text explicitly states: 'For example, substances like glucose, amino acids, Na$^+$, etc., in the filtrate are reabsorbed actively whereas the nitrogenous wastes are absorbed by passive transport.'
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.