Practice free Cell Structure (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
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...')
Movement of substances between the nucleus and the cytoplasm occurs through:
The nuclear pores are the passages through which movement of RNA and protein molecules takes place in both directions between the nucleus and the cytoplasm.
Nucleoplasm is another name for:
The NCERT states, 'The nuclear matrix or the nucleoplasm contains nucleolus and chromatin.'
Which of the following functions is carried out by cytoskeleton in a cell?
NCERT lists cytoskeleton roles as mechanical support, motility and shape maintenance.
Broad palm with single palm crease is visible in a person suffering from:
Simian crease (single transverse palmar crease) is a classic Down syndrome feature.
Which one of the following symbols represents mating between relatives in human pedigree analysis?
A double horizontal line between the mating pair denotes a consanguineous (relative-to-relative) mating — option B.
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