MCQs on Reproduction in Bacteria

 Asexual reproduction in bacteria is by binary fission. It is the main mode of their propagation. Binary fission leads to the formation of identical copies of a cell without any genetic recombination. As genetic diversity is a key to survival, bacteria also undergo alternative reproduction methods, whereby sharing of genetic material occurs, namely conjugation, transformation and transduction.

1. Binary fission in bacteria does not involve

(a) spindle formation

(b) DNA duplication

(c) Cytokinesis

(d) Cell elongation

Answer: (a)

2. Transfer of genetic material from the donor to recipient bacterium through cell contact is termed as

(a) transduction

(b) recombination

(c) conjugation

(d) transformation

Answer: (c)

3. Common vegetative reproduction in bacteria is by

(a) conjugation

(b) budding

(c) oidia

(d) binary fission

Answer: (d)

4. Transfer of genetic material in bacteria through virus is termed as

(a) transduction

(b) recombination

(c) conjugation

(d) transformation

Answer: (a)

5. Genetic recombination between bacterial cells is first demonstrated by

(a) Ochoa and Kornberg

(b) Har Gobind Khorana

(c) H. J. Muller

(d) Lederberg and Tatum

Answer: (d)

6. Which of the following methods of reproduction proved for the first time that DNA is genetic material?

(a) Binary fission

(b) Conjugation

(c) Transduction

(d) Transformation

Answer: (d)

7. Mode of action of penicillin is by

(a) inhibiting RNA synthesis

(b) inhibiting cell wall formation

(c) destroying chromatin

(d) inhibiting spindle formation

Answer: (b)

8. Bacterial sex factor is

(a) F-factor

(b) col-factor

(c) R-factor

(d) RNA

Answer: (a)

9. Which of the following bacteriophages are responsible for specialised transduction?

(a) T4 phages

(b) Lysogenic phages

(c) Lytic phages

(d) Both (b) and (c)

Answer: (b)

10. Transduction was discovered by

(a) Zinder and Lederberg

(b) Ivanovsky

(c) Griffith

(d) Avery et al

Answer: (a)

Comments

Post a Comment

Popular posts from this blog

Chloroplasts Questions With Answers

  The photosynthesis-conducting organelles which is the site where chlorophyll traps solar energy converting it and storing it in the energy storage molecules – NADPH and ATP are called Chloroplasts. Chloroplasts are functional in the calvin cycle performing a number of functions. It is a type of organelle referred to as a plastid. 1. The bright colours of ripe fruits is due to (a) Chromoplasts (b) Chloroplasts (c) Amyloplasts (d) Leucoplasts Answer: (a) 2. Factory for synthesis of sugars in autotrophic eukaryotes (a) Mitochondria (b) Chloroplast (c) Ribosome (d) Endoplasmic reticulum Answer: (b) 3. Stroma is the ground material of which of these (a) Ribosomes (b) Lysosomes (c) Mitochondria (d) Chloroplasts Answer: (d) 4. When green tomatoes fruits turn to red, then (a) new chromoplasts are formed (b) chloroplasts are disintegrated and get converted into chromoplasts (c) chromoplasts are changed to chloroplasts (d) none of these Answer: (b) 5. The thylakoid in chloroplasts are arra...
Read more

Parts Of Plants MCQs for NEET

  Plants are biotic factors of the ecosystem. They are photosynthetic, multicellular, eukaryotic in nature and are grouped distinctly into Kingdom Plantae. Contrary to the animals, plants possess a well-defined cell and specialized structures that are chiefly linked with cellular functionalities. These are the only living species who can manufacture/synthesize their own food. They are able to do so because of the presence of specialized structures in the cells of plants. Typically plant parts can be classified as the root system and the shoot system. 1. Which of the following factors promotes the opening of the stomatal aperture? (a) A decrease in guard cell turgidity (b) When the outer walls of the guard cells contracts (c) Radial orientation of the cellulose microfibrils in the cell wall of the guard cells (d) The longitudinal orientation of the cellulose microfibrils in the cell wall of guard cells Answer: (c) 2. Which of the following is made of dead cells? (a) Phloem (b) Phell...
Read more

Earthworm Digestive System Questions With Answers

  Belonging to the Phylum Annelida, Earthworms are invertebrates. These annelids are usually found inhabiting soil, making it fertile, which is of great economic importance. They have a segmented, long cylindrical body and are hermaphrodites. Earthworms feed on dead organic matter. Explore important MCQs on Earthworm here. 1. The earthworm is placed under the group (a) Polychaeta (b) Hirudinea (c) Oligochaeta (d) Crustacea Answer: (c) 2. The parasite found in the seminal vesicle of earthworms are (a) Nosema (b) Sarcocystis (c) Monocystis (d) Nyctotherus Answer: (c) 3. The typhlosole in earthworm is related to (a) respiration (b) excretion (c) absorption (d) reproduction Answer: (c) 4. Colour of the body in earthworms is due to the presence of (a) Haemoglobin (b) Blood (c) Porphyrin (d) Haemocyanin Answer: (c) 5. Region of earthworm that is a forest of nephridia is (a) Pharyngeal region (b) Clitellar region (c) Typhlosolar region (d) Intestinal region Answer: (b) 6. Chloragogen cell...
Read more