Biology Multiple Choice Questions on “Biological Classification – Protista – 1”.
1. Protists survive in ________
a) dry desert
b) aquatic regions
c) dry mountains
d) hot hills
Answer: b
Clarification: Protists survive in aquatic regions. They can either survive in fresh water lakes, large oceans, deep seas and marshy areas etc. This is because their body is adapted to survive in areas with low oxygen concentration.
2. Which among the following comprises of animal like protists?
a) Protozoans
b) Chrysophytes
c) Slime molds
d) Dianoflagellates
Answer: a
Clarification: Since, Protozoans are mobile and can ingest food into their body they resemble animals. Some of the protozoans follow holozoic nutrition like that of animals. Therefore, Protozoans are animal like protists.
3. Diatoms are grouped under _________
a) Chrysophytes
b) Protozoans
c) Dianoflagelletes
d) Euglenoids
Answer: a
Clarification: Diatoms are grouped under Chrysophytes. Chrysophytes comprise of golden algae, diatoms and plant like protists etc. It’s because of the golden-yellow color of the species they are named as Chrysophytes.
4. Cell wall in diatoms is made of _______
a) Chitin
b) Pectin
c) Silica
d) Cellulose
Answer: c
Clarification: Cell wall in diatoms is made up of Silica. It’s a double shelled cell wall that fits exactly into each other like the lid of a box. Cell wall of diatoms remains in the earth even after they die and accumulate to form diatomaceous earth.
5. Diatomaceous earth can be used as a pest control because _________
a) it is porous
b) it contains silica which is poisonous for pests when eaten and therefore they die
c) it snatches out lipids from the outermost waxy layer of pests called cuticle and makes them dry which results in their death
d) it acts as anesthesia when given in minor quantities but pests die when large quantities are in taken
Answer: c
Clarification: Diatomaceous earth is used in pest control and grain storage. This is because they are abrasive in nature which snatches out lipids from the outermost layer of pests called cuticle and makes them dry which results in their death.
6. Diatoms store food as _______
a) Starch
b) Glucose
c) Oil
d) Fructose
Answer: c
Clarification: Diatoms store food as oil. Plants store their food as starch. Diatoms are the main food producing bodies in oceans. They prepare food by photosynthesis.
7. Chrysophytes contain chlorophyll or carotene or xanthophyll in them. Their cell wall is rigid and is made up of chitin.
a) True
b) False
Answer: b
Clarification: Chrysophytes contain chlorophyll or carotene or xanthophyll in them. Chrysophytes attain color due to these pigments present in them. Their cell wall is rigid and is made up of Cellulose/ Pectin/ Silica.
8. Cell wall in dianoflagelllates contain _______
a) Chitin
b) Cortex
c) Silica
d) Pectin
Answer: b
Clarification: Dianoflagellates have a complex cell wall made up of cortex. They also possess light sensitive organelle in their cell. Eye spot is found in some of them. Erythropsidium is known to have smallest eye.
9. Dianoflagellates contain ________
a) two flagella with both being transversal
b) two flagella with both being longitudinal
c) two flagella with lone being longitudinal and other being transversal
d) three flagella with one being along x-axis, other being along y-axis and the third one being along z-axis