Cell: The Unit of Life

Which of the following statements is not correct?

1. Lysosomes are membrane bound structures.
2. Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
3. Lysosomes have numerous hydrolytic enzymes.
4. The hydrolytic enzymes of lysosomes are active under acidic pH.

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.

Mitochondria and chloroplast are- Which one of the following options is correct?

1. Both A and B are false
2. Both A and B are correct
3. B is true but A is false
4. A is true but B is false

Microtubules are the constituents of

1. Cilia, Flagella and Peroxisomes
2. Centrosome, Nucleosome and Centrioles
3. Spindle fibres, Centrioles and Cilia
4. Centrioles, spindle fibres and chromatin

Which one of the following cell organelles is enclosed by a single membrane?

1. Mitochondria
2. Chloroplasts
3. Lysosomes
4. Nuclei

Select the mismatch.

1. Large central vacuoles – Animal cells
2. Methanogens – Prokaryotes
3. Gas vacuoles – Green bacteria
4. Protists – Eukaryotes

Select the wrong statement-

1. Pili and fimbriae are mainly involved in motility of bacterial cells
2. Mycoplasma is a wall-less microorganism
3. Bacterial cell wall is made up of peptidoglycan
4. Cyanobacteria lack flagellated cells.

A cell organelle containing hydrolytic enzymes is

1. Ribosome
2. Mesosome
3. Lysosome
4. Microsome

The structures that help some bacteria to attach to rocks and/or host tissues are

1. mesosomes
2. holdfast
3. rhizoids
4. fimbriae.

Chromatophores take part in

1. movement
2. respiration
3. photosynthesis
4. growth.

Balbiani rings are sites of :

1. Polysaccharide synthesis
2. Lipid synthesis
3. RNA and protein synthesis
4. Nucleotide synthesis

Which of the following structures is not found in a prokaryotic cell?

1. Mesosome
2. Nuclear envelope
3. Ribosome
4. Plasma membrane

Cellular organelles with membranes are -

1. endoplasmic reticulum, ribosomes and nuclei
2. lysosomes, Golgi apparatus and mitochondria
3. nuclei, ribosomes and mitochondria
4. chromosomes, ribosomes and endoplasmic reticulum

Which of the following are not membrane-bound ?

1. Ribosomes
2. Mesosomes
3. Lysosomes
4. Vacuoles

DNA is not present in :

1. Nucleus
2. Chloroplast
3. Mitochondria
4. Ribosomes

Nuclear envelope is a derivative of :

1. Membrane of Golgi complex
2. Smooth endoplasmic reticulum
3. Rough endoplasmic reticulum
4. Microtubules

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

1. Stroma lamellae
2. Cristae
3. Stroma
4. Grana

Select the correct matching in the following pairs :

1. Rough ER – Oxidation of fatty acids
2. Smooth ER – Oxidation of phospholipids
3. Rough ER – Synthesis of glycogen
4. Smooth ER – Synthesis of lipids

The chromosomes in which centromere is situated close to one end are :

1. Telocentric
2. Metacentric
3. Sub-metacentric
4. Acrocentric

Which one of the following is not an inclusion body found in prokaryotes?

1. Cyanophycean granule
2. Phosphate granule
3. Polysome
4. Glycogen granule

Which structures perform the function of mitochondria in bacteria?

1. Nucleoid
2. Ribosomes
3. Cell wall
4. Mesosomes