Multiple Choice Questions on Bacteria:
1. Which organism reproduces offspring without going through meiosis and fertilization______
A. bacteria
B. rabbit
C. frog
D. wheat
Answer: A
2. The largest bacteria which can be visible by unaided eye is_______
A. Thiomargarita namibiensis
B. Lactobacillus
C. Mycoplasma
D. Pseudomonas
Answer: A
3. Which of the following is not part of the basic structure of bacteria______
A. flagella
B. ribosome
C. Plasmid
D. cell wall
Answer: D
4. Which of the following is a gram-positive eubacterium?
A. Actinomyces
B. Clostridium
C. Rhizobium
D. Clostridium, Actinomyces
Answer: D
5. Which of the following cannot occurs in bacterial reproduction_____
A. Splitting of centromeres
B. DNA replication
c. cell wall formation
D. protein synthesis
Answer: A
6. Which of the following is NOT the basic shape of the bacteria?
A. Rod shape
B. Square shape
C. Comma shape
D. Spiral shape
Answer: B
7. Which statement about Escherichia coli is true_______
A. Tetracycline inhibits protein synthesis in cells
B. High-producing human insulin strains can be obtained by mutation breeding
C. Cells contain only four bases A, T, C, and
G. T2 phage infects cells without causing cell lysis
Answer: A
8. The bacterium that infects other gram-negative bacteria is_______
A. Proteus mirabilis
B. Haemophilus influenza
C. Bdellovibrio
D. Pseudomonas putida
Answer: C
9. The statement about nitrifying bacteria is correct:
① It contains ribosomes but not chloroplasts
② It contains DNA and RNA, and the DNA is located on chromosomes
③ Because it is an aerobic microorganism, it contains mitochondria
④ Inheritance does not follow Mendel’s laws genetic mutation
A. ②③④
B. ①④⑤
C. ①②③⑤
D. ①②④⑤
Answer: B
10. This is analogous to mesosomes of bacteria_______
A. Golgi apparatus of eukaryotes
B. Lysosomes of eukaryotes
C. Mitochondria of eukaryotes
D. None of the above
Answer: C
11. Mendel's laws of inheritance do not apply to unicellular organisms such as bacteria, the main reason is: unicellular organisms such as bacteria
A. Genetic material is not DNA
B. Genetic material is not on chromosomes
C. Usually asexual reproduction
D. no nucleus
Answer: C
12. Which of the following organisms have thick peptidoglycan in their cell wall?
A. Gram-negative bacteria
B. Gram-positive bacteria
C. Yeast
D. Molds
Answer: B
13. False statement about Bacillus anthracis_______
A. It has the structure of cell wall, cell membrane, cytoplasm and nucleoid
B. Reproduction by binary fission
C. Outside the nucleocapsid, there is an envelope composed of polysaccharides, proteins and lipids
D. Assimilation type is chemoheterotrophy
Answer: C
14. This about cell wall of gram-positive bacteria is true
A. cell wall comprises of many layers
B. the cell wall is thicker than the associated gram-negative bacteria
C. Cell wall comprises of teichoic acids
D. All of the above
Answer: D
15. What is Chemotaxis?
A. Swimming towards a bacteria
B. Swimming away of a bacteria
C. In the presence of a chemical compound, swimming towards or away of a bacteria
D. None of these
Answer: C
16. Which statement about actinomycetes is incorrect is________
A. A multicellular prokaryotic organism
B. Usually composed of branched hyphae
C. Intrabasal mycelium is related to nutrient absorption
D. Aerial hyphae are associated with sporogenesis
Answer: A
17. Which of the following is the comma shaped bacteria?
A. Sarcina
B. Bacilli
C. Vibrio
D. Spirilla
Answer: C
18. Which type of bacteria prepare their own food by utilization of solar energy?
A. Heterotrophic bacteria
B. Autotropic Bacteria
C. Tetra coccts bacteria.
D. Diploccus bacteria
Answer: B
19. Which of the following bacteria has no flagella?
A. Amphitrichous
B. Peritrichous
C. Lophotrichous
D. Atrichos
Answer: D