Prokaryotes – Online MCQs Test – Biology MCAT

1. The DNA of E.coli is

Single stranded and circular

Single stranded and linear

Double stranded and circular

Double stranded and linear

2. The method of survival of bacteria under unfavourable conditions is:

Binary Fission

Endospore Formation

Binary Fusion

Exospore Fonnation

3. Which statement explains how mass flow arises in sieve tube elements?

Sucrose actively loaded into sieve tube elements increases the water potential causing the hydrostatic pressure to increase.

Sucrose diffused into sieve tube elements increases he water potential causing the hydrostatic pressure to decrease

Sucrose actively loaded into sieve tube elements decreases the water potential causing the hydrostatic pressure to increase

Sucrose diffused into sieve tube elements decreases the water potential causing the hydrostatic pressure to increase.

4. Nucleic acids in chromosomes in bacteria are

Linear DNA

Two types of DNA and RNA

Circular DNA

Linear RNA

5. Bio-fertilizers include

Nitrogen fixing bacteria

Nitrogen fixing cyanobacteria

All of these

Mycorrhiza

6. The bacteria are:

None of these

Prokaryotic

Mesokaryotic

Eukaryotic

7. Colour less, unicellular, cell wall bound. spherical or rod-shaped micro-organism and lacking organized nucleus is called

Bacteria

Cyanobacteria

Mycoplasma

Virus

8. It is the measure of force with which blood pushes up against the walls of blood vessels

Blood pressure

Cardiac output

Blood flow

Stroke volume

9. Transfer of genetic information from one bacterium to another in the transduction process is through

Conjugation between opposite strain bacterium

Physical contact between donor and recipient strains

Bacteriophages released from the donor bacterial strain

Another bacterium having special organ for conjugation

10. Mesosome in a bacterial cell is

None of these

Plasmid

Plasma membrane infolded for respiration

Connection between two cells

11. Bacteria which rarely show chemotaxis are

Bacilli

Spiral

Spirochete

Cocci

12. In bacterial growth curve, inactive phase is:

Stationary Phase

Death Phase

LAG Phase

LOG Phase

13. Genes for antibiotic resistance are located in

Chromosome

Plasmid

Nucleus

Cell wall

14. Simple process of genetic recombination in which genetic material is transterred from one bacterium to another through a tube is called:

Conjugation

Endospore Formation

Binary Fission

Transduction

15. Microorganisms were first observed by:

Wendel Stanley

Iwanowsky

Leeuwenhoek

Shwartz

16. The length of the bacteria measures from:

2 – 10 μ

2 – 5 μ

0.2 – 2 μ

2 – 3 μ

17. Plasmids occur in

Chloroplasts

Viruses

Bacteria

Chromosomes

18. Which sequence of events correctly describes the action of a phagocyte when a pathogen is encountered?

endocytosis → phagocylic vacuole formation → digestion by lysosome enzymes → exocytosis

exocytosis → ptiagocyh vacuoIe formation → digestion by lysosome enzymes → phagocytosis

endocytosis → digestion by lysosome enzyme → phagocytic vacuole formation → exocytosis

phagocytosis → digestion by Iysosome enzymes → phagocytic vacuole formation → endocytosis.

19. Bacterial flagella is made up of

Amines

Protein

Carbohydrates

Lipids

20. The Fastest mode of asexual reproduction found in the living organisms is:

Endospore Formation

Binary Fusion

Exospore Fonnation

Binary Fission

Prokaryotes-Medical College Admission Test Preparation Notes