Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called___________?

Related Mcqs:

1. If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?

   A. Open reduction.
   B. Closed Fixation.
   C. Open fixation.
   D. Immobilization

2. Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

   A. Diffusion
   B. Passive transport
   C. Osmosis
   D. Active transport

3. What is called movement of cell against concentration gradient ?

   A. Passive Transport
   B. Osmosis
   C. Active Transport
   D. Diffusion

   Submitted by: Malik Asghar Hussain

4. _________________ cells of phloem are directly involved in transport of organic solutes?

   A. Parenchyma
   B. Companion cell
   C. Tracheid
   D. Sieve element

5. A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called___________?

   A. Transpiration pull
   B. Root pressure
   C. Osmotic pressure.
   D. None of these

6. Empty diatom cells are called___________?

   A. Raphe
   B. Valves
   C. Frustule
   D. Girdles

7. branches of biology and medicine concerned with the structure and function of plant and animal cells is called___________?

   A. Nephrology
   B. Semiology
   C. Orology
   D. Cytology

   Submitted by: Rana Wasim Jamil

8. If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of____________________?

   A. Enzymes get denatured at higher substrate conc
   B. Rate of reaction is indirectly proportional to substrate concentration at this point
   C. All the active sites on enzyme molecule are occupied
   D. None of these

9. If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have___________?

   A. 40 chromosomes
   B. 20 chromosomes
   C. 10 chromosomes
   D. While some other will have 20

   Submitted by: Rashid Mehmood

10. There are cells in human body called Faggot cells which cause__________?

    A. AIDS
    B. Tuberculosis
    C. Smallpox
    D. Leukaemia

    Submitted by: Ali Mallah