Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Who first described the nucleus as a cell organelle?
According to the NCERT text, 'Nucleus as a cell organelle was first described by Robert Brown as early as 1831.'
The material of the nucleus that stains with basic dyes was named chromatin by:
The NCERT states, 'Later the material of the nucleus stained by the basic dyes was given the name chromatin by Flemming.'
Which of the following describes the nuclear envelope?
The text mentions, 'Electron microscopy has revealed that the nuclear envelope, which consists of two parallel membranes with a space between (10 to 50 nm) called the perinuclear space...'
What is the primary function of nuclear pores?
The NCERT states, 'These nuclear pores are the passages through which movement of RNA and protein molecules takes place in both directions between the nucleus and the cytoplasm.'
Which of the following cells would typically lack a nucleus in their mature state?
The text provides examples: 'Some mature cells even lack nucleus, e.g., erythrocytes of many mammals and sieve tube cells of vascular plants.'
What is the nature of the nucleolus?
The NCERT states, 'The content of nucleolus is continuous with the rest of the nucleoplasm as it is not a membrane bound structure.'
What is the primary function of the nucleolus?
The text clearly states, 'It is a site for active ribosomal RNA synthesis.'
Cells actively carrying out protein synthesis are likely to have:
The NCERT mentions, 'Larger and more numerous nucleoli are present in cells actively carrying out protein synthesis.'
The outer membrane of the nuclear envelope typically remains continuous with which organelle?
The text states, 'The outer membrane usually remains continuous with the endoplasmic reticulum and also bears ribosomes on it.'
The interphase nucleus contains all of the following EXCEPT:
The interphase nucleus (nucleus of a cell when it is not dividing) has highly extended and elaborate nucleoprotein fibres called chromatin, nuclear matrix and one or more spherical bodies called nucleoli. Centrioles are located outside the nucleus, contributing to the basal body of cilia/flagella and spindle fibers. (Relevant text: 'The interphase nucleus (nucleus of a cell when it is not dividing) has highly extended and elaborate nucleoprotein fibres called chromatin, nuclear matrix and one or more spherical bodies called nucleoli...')
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.