Cell: The Unit of Life

The shorter and longer arms of a submetacentric chromosome are referred to as:

1. q-arm and p-arm respectively
2. m-arm and n-arm respectively
3. s-arm and l-arm respectively
4. p-arm and q-arm respectively

The concept of " Omnis cellula-e cellula" regarding cell division was first proposed by :

1. Schleiden
2. Aristotle
3. Rudolf Virchow
4. Theodore Schwann

Which of the following is true for nucleolus?

1. It takes part in spindle formation
2. Larger nucleoli are present in dividing cells
3. It is a membrane-bound structure
4. It is a site for active ribosomal RNA synthesis

The Golgi complex participates in

1. activation of amino acid
2. fatty acid breakdown
3. formation of secretory vesicles
4. respiration in bacteria

Which of the following events does not occur in rough endoplasmic reticulum?

1. Cleavage of signal peptide
2. Phospholipid synthesis
3. Protein folding
4. Protein glycosylation

Select the incorrect match.

1. Allosomes – Sex chromosomes
2. Sub-metacentric chromosomes – L-shaped chromosomes
3. Lampbrush chromosomes – Diplotene bivalents
4. Polytene chromosomes – Oocytes of amphibians

Which of the following components provides sticky character to the bacterial cell?

1. Nuclear membrane
2. Plasma membrane
3. Glycocalyx
4. Cell wall

DNA replication in bacteria occurs

1. within nucleolus
2. prior to fission
3. just before transcription
4. during S phase

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

1. Ribosome
2. Mitochondrion
3. Chloroplast
4. Lysosome

Water soluble pigments found in plant cell vacuoles are

1. carotenoids
2. anthocyanins
3. xanthophylls
4. chlorophylls.