Explore topic-wise MCQs in Microbiology.

This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.

1.

and are similar because

A. they both are motile
B. they are members of the Chlorophyta
C. Both (a) and (b)
D. none of these
Answer» D. none of these
Discussion
2.

The number of members of the division Phaeophyta that live in freshwater habitats

A. is greater than the number of members of the division Chloro-phyta that live in freshwater habitats
B. is lesser than the number of members of the division Chlorophyta that live in freshwater habitats
C. is equal to the number of members of the division Chlorophyta that live in freshwater habitats
D. none of the above
Answer» C. is equal to the number of members of the division Chlorophyta that live in freshwater habitats
Discussion
3.

The kelps are algae found in

A. chlorophyta
B. chrysophyta
C. phaeophyta
D. pyrrophyta
Answer» D. pyrrophyta
Discussion
4.

The algae Chlamydomonas demonstrates a complex life cycle that switches between haploid and diploid forms. This life cycle is called

A. the sexual-asexual exchange
B. the transposition cycle
C. an alternation of generations
D. algal transformation
Answer» D. algal transformation
Discussion
5.

Algae are found in all of the following places except

A. oceans
B. soils
C. lakes and streams
D. associates with fungi
Answer» C. lakes and streams
Discussion
6.

Chlamydomonas and Volvox are similar because

A. they both are motile
B. they are members of the Chlorophyta
C. Both (a) and (b)
D. none of these
Answer» D. none of these
Discussion
7.

Characteristics used to place algae into divisions include all of the following except

A. form of storage material
B. flagella number and location
C. accessor pigments used in photosynthesis
D. all of the above
Answer» E.
Discussion
8.

Frustules made of silica are characteristic of

A. euglenoids
B. diatoms
C. desmids
D. seaweeds
Answer» C. desmids
Discussion
9.

Which of the following best describes the algae known as diatoms?

A. Cells have intricate shells of silicon dioxide with two halves
B. Cells are encased in rigid walls composed of cellulose coated with silicon
C. Cells have flagella and a light-detecting eye spot
D. Cells contain carotenoid pigments as well as chlorophyll A and B
Answer» B. Cells are encased in rigid walls composed of cellulose coated with silicon
Discussion
10.

Chrysolaminarin is an energy storage material characteristic of

A. chlorophyta
B. chrysophyta
C. phaeophyta
D. rhodophyta
Answer» C. phaeophyta
Discussion
11.

The number of flagella produced by motile cells in

A. members of the Rhodophyta is greater than members of the Phaeophyta
B. members of the Phaeophyta is greater than members of the Rhodophyta
C. members of the Rhodophyta is exactly or approximately equal to members of the Phaeophyta
D. none of the above
Answer» C. members of the Rhodophyta is exactly or approximately equal to members of the Phaeophyta
Discussion
12.

Algae are classified into 6 groups, technically known as

A. categories
B. divisions
C. genera
D. domains
Answer» C. genera
Discussion
13.

The __________ is the vegetative body of algae.

A. mycelium
B. plasmodium
C. pseudoplasmodium
D. thallus
Answer» E.
Discussion
14.

Agar, which is the solidifying agent in many bacterial culture media, is part of the cell wall of

A. chlorophyta
B. chrysophyta
C. pyrrophyta
D. rhodophyta
Answer» E.
Discussion
15.

Which algal division never produces motile, flagellated cells among any of its members?

A. Chlorophyta
B. Chrysophyta
C. Phaeophyta
D. Rhodophyta
Answer» E.
Discussion
16.

Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to

A. chlorophyta
B. chrysophyta
C. pyrrophyta
D. rhodophyta
Answer» D. rhodophyta
Discussion
17.

All algae possess

A. nuclei
B. chloroplasts
C. Both (a) and (b)
D. none of these
Answer» D. none of these
Discussion
18.

Algae is a nonvalid taxinomic term that refers to

A. eukaryotic organisms that have chlorophyll a and produce O
B. <sub>2 </sub>
C. well developed cellular structure including a conducting system
D. Both (a) and (b)
E. none of the above
Answer» B. <sub>2 </sub>
Discussion
19.

Which of the following algal divisions is characterized by possession of chlorophylls A and B, paramylon as the energy storage material, and the presence of a pellical instead of a cell wall?

A. Chlorophyta
B. Euglenophyta
C. Pyrrophyta
D. Chrysophyta
Answer» C. Pyrrophyta
Discussion
20.

Laminarin is an energy storage material characteristic of

A. chlorophyta
B. chrysophyta
C. phaeophyta
D. pyrrophyta
Answer» D. pyrrophyta
Discussion
21.

Which algal division is divided up into three main groups consisting of the golden-brown algae, the yellow-green algae and the diatoms?

A. Chlorophyta
B. Chrysophyta
C. Phaeophyta
D. Pyrrophyta
Answer» C. Phaeophyta
Discussion
22.

Bioluminescence is a phenomenon associated with

A. chrysophyta
B. phaeophyta
C. pyrrophyta
D. chlorophyta
Answer» D. chlorophyta
Discussion
23.

Number of flagella produced by motile cells in

A. members of the phaeophyta is greater than members of the Oomycota
B. members of the Oomycota is greater than members of the Phaeophyta
C. members of the Phaeophyta is approximately equal to members of the Oomycota
D. none of the above
Answer» D. none of the above
Discussion
24.

Starch is an energy storage material characteristic of

A. chlorophyta
B. chrysophyta
C. phaeophyta
D. rhodophyta
Answer» E.
Discussion
25.

Which of the following algal divisions is characterized by possession of chlorophylls A and B, starch as the energy storage material, cellulosic cell walls and live in freshwater and marine habitats?

A. Chlorophyta
B. Chrysophyta
C. Phaeophyta
D. Pyrrophyta
Answer» B. Chrysophyta
Discussion