Diatoms belong to___________?

Related Mcqs:

1. Unlike other algae, diatoms do not readily decay due to___________?

   A. Nonliving cells
   B. Siliceous wall
   C. Mucilaginous wall
   D. Water proof cell

2. Diatoms stay afloat due to___________?

   A. Flagella
   B. Stored lpids
   C. Pseudopodia
   D. All of these

3. Bats & humming birds belong to___________?

   A. Endotherms
   B. Ectotherms
   C. Heterotherms
   D. Homeotherms

4. Which one of the following is representing the group of diatoms?

   A. Pinnularia, Navicula, Cymbella, Melosira
   B. Euglenamorpha, Hedneria , Heteronema, Colacium
   C. Nostoc, Anabaena, Aulosira, Cylindrospermum
   D. Cochlodinium, Gymnodinium, Lenodinium, Peridinium

5. Diatoms are found in__________?

   A. Phytoplanktonic population
   B. Freshwater lakes and ponds
   C. Marine environment
   D. All of the above

6. Centric discoid form of diatoms is__________?

   A. Diplaneis
   B. Coscinodiscus
   C. Camphyloneiscus
   D. Stephanodis

7. The chloroplasts of diatoms and chrysophycean algae do not possess____________?

   A. Chloryphyllpigments
   B. Enzymes for photolysis
   C. Defined grana and stroma
   D. Carotenes with chlorophylls

8. Locomotion in diatoms is carried out with the help of__________?

   A. Valve
   B. Raphe
   C. Pseudopodium
   D. Cilia or flagella

9. Golden brown colour of diatoms is due to presence of__________?

   A. Mycoxanthin, mucoxanthin and myxoxanthophylls
   B. Alpha and beta carotenes and myxoxanthin
   C. Fucoxanthin, diatoxanthin, diadinoxanthin
   D. None of the above

10. The DNA fragments have sticky ends due to___________?

    A. Endonuclease
    B. Unpaired bases
    C. Calcium ions
    D. Free methylation

    Submitted by: Maria Aziz