Practice Pakistan's most useful MCQs for competitive exams

Chitin in cockroach is absent in____________?

• (A)  Epicuticle
• (B)  Exocuticle
• (C)  Endocuticle
• (D)  All of these

Answer

Submitted By :Ali Uppal

In man which organisms cause abscesses on the skin of arms or legs?

• (A)  Ascaris
• (B)  Bacteria
• (C)  Ring worm
• (D)  Suinea worm

Answer

Submitted By :Ali Uppal

In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?

• (A)  Endodermis
• (B)  Mesophyll
• (C)  Chitin
• (D)  Epidermis

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Diatom frustule/ shell is made of_____________?

• (A)  Silica
• (B)  Calcium carbonate
• (C)  Manesium carbonate
• (D)  Both

Answer

Submitted By :Ali Uppal

Empty diatom cells are called___________?

• (A)  Raphe
• (B)  Valves
• (C)  Frustule
• (D)  Girdles

Answer

Submitted By :Ali Uppal

Cell wall is extremely well preserved in fossil specimens in__________?

• (A)  Diatoms
• (B)  Dinoflagellates
• (C)  Slime moulds
• (D)  None of these

Answer

Submitted By :Ali Uppal

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

• (A)  Nonliving cells
• (B)  Siliceous wall
• (C)  Mucilaginous wall
• (D)  Water proof cell

Answer

Submitted By :Ali Uppal

The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in__________?

• (A)  Diatoms
• (B)  Desmids
• (C)  Pyrrophyta
• (D)  Chlorophyta

Answer

Submitted By :Ali Uppal

Cell wall is richly impregnated with silica in__________?

• (A)  Rhodophyta
• (B)  Phaeophyta
• (C)  Baciliariophyta
• (D)  Euglenophyta

Answer

Submitted By :Ali Uppal