Biology Mcqs

Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?

• (A)  600 Kpa
• (B)  800 Kpa
• (C)  1000 Kpa
• (D)  900 Kpa

Answer

Submitted By :Ali Uppal

Commonly in other plants than tall ones the speed of upward movement of water is____________?

• (A)  8mh-1
• (B)  1 mh-1
• (C)  7 mh-1
• (D)  4 mh-1

Answer

Submitted By :Ali Uppal

___________ component of cell wall has grreat affinity with water?

• (A)  Lignin
• (B)  Cellulose
• (C)  Pectin
• (D)  All of these

Answer

Submitted By :Ali Uppal

___________ potential is the measure of the change in water potential of a system due to the presence of solute molecules?

• (A)  Osmotic
• (B)  Pressure
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

• (A)  Deffusion
• (B)  Osmosis
• (C)  Active transport
• (D)  None of these

Answer

Submitted By :Ali Uppal

The pressure generated when water enters & inflates plant cells is called ___________ potential?

• (A)  Water
• (B)  Osmotic
• (C)  Pressure
• (D)  Solute

Answer

Submitted By :Ali Uppal

In plants, water potential is determined by major factors?

• (A)  Three
• (B)  Four
• (C)  Two
• (D)  Five

Answer

Submitted By :Ali Uppal

Cytoplasmic strands that extend through pores in adjacent cell walls are known as___________?

• (A)  Pseudopods
• (B)  Symplasts
• (C)  Plasmodesmata
• (D)  Pili

Answer

Submitted By :Ali Uppal

In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.

• (A)  Tonoplast
• (B)  Apoplast
• (C)  Symplast
• (D)  Vacuolar.

Answer

Submitted By :Ali Uppal

In plants, the neighbouring cells are connected with one another by__________?

• (A)  Plasmodesmata
• (B)  Cell walls
• (C)  Vacuoles
• (D)  Both ‘A’ & ‘B’

Answer

Submitted By :Ali Uppal