Cell: The Unit of Life · Question 47

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.