This set of Microbiology Multiple Choice Questions & Answers (MCQs) focuses on “Algae – Classification”.
1. Carpogonia is the female sex organ in which of the algae?
a) Rhodophycophyta
b) Xanthophycophyta
c) Chrysophycophyta
d) Chlorophycophyta
View Answer
Explanation: Rhodophycophyta reproduces sexually heterogamously by the union of well-differentiated nonmotile male and female germ cells, the spermatia and carpogonia (female sex organs), respectively.
2.The xanthophyte walls are typically of _____________________
a) chitin
b) cellulose
c) cellulose and pectin
d) starch
View Answer
Explanation: The xanthophye walls are typically of cellulose and pectin. The cellular storage product is an oil or (a branched glucan) chrysolaminarin.
3. Vaucheria is a single-celled organism.
a) True
b) False
View Answer
Explanation: Vaucheria has a very large macroscopic filamentous form. It is widely distributed on moist soil and water.
4. Chrysamoeba exists in which of the following forms?
a) nonmotile coccoid
b) filamentous
c) amoeboid
d) motile amoeboid
View Answer
Explanation: Chrysamoeba is a strongly amoeboid genus with flagella. It belongs to the group of golden algae.
5. Kelps are which of the following type of algae?
a) red algae
b) yellow algae
c) brown algae
d) green algae
View Answer
Explanation: Brown algae are structurally quite complex and kelps belong to this group. Kelps are large, the individual plants reaching a length of several hundred feet.
6. Frustules are found in which of the following algae?
a) Bacillariophycophyta
b) Chlorophycophyta
c) Euglenophycophyta
d) Rhodophycophyta
View Answer
Explanation: Bacillariophycophyta or diatoms produce shells (cell walls) containing silica, some of which are very beautiful. Shells of diatoms are called frustules.
7. Euglena contains cell wall made up of cellulose.
a) True
b) False
View Answer
Explanation: Euglena has no cell wall containing cellulose. The outer membrane is an organized periplast.
8. Which of the following are formed in pyrenoids?
a) oil
b) glucose
c) starch
d) silica
View Answer
Explanation: The chloroplasts of green algae often contain dense regions called pyrenoids, on which surface starch granules are formed.
9.In Chlamydomonas the most common method of sexual reproduction is ________________
a) isogamy
b) heterogamy
c) oogamy
d) spore formation
View Answer
Explanation: Sexua reproduction occurs in many species of Chlamydomonas, by isogamy, heterogamy, or oogamy in which isogamy is by far the most common. The zygote divides to form four or eight motile haploid cells are released.
10. Which of the following is a colonial green alga?
a) Chlamydomonas
b) Chlorella
c) Volvox
d) Spirogyra
View Answer
Explanation: Volvox is a colonial green alga which may form water blooms. Its colonies are visible to the naked eye.
Sanfoundry Global Education & Learning Series – Microbiology.
To practice all areas of Microbiology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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