Which of the following is most toxic?

Related Mcqs:

1. Which one of the following toxic metals is extensively present in newspaper?

   A. Mg
   B. Cd
   C. Pb
   D. Hg

   Submitted by: Eesha Khalid

2. Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________?

   A. Integrated disease management
   B. Hydroponic culture technique
   C. Pasteurization
   D. Bioremediation

3. The elimination of toxic nitrogenous waste and excess water in man is by______?

   A. Excretion
   B. Circulation
   C. Reproduction
   D. Pollution

   Submitted by: Yousuf Sanjrani

4. Which of the following statement is incorrect about Glyoxisomes?

   A. They contain enzymes which help in conversion of fatty acids into carbohydrate
   B. They are abundant in soyabeans but absent in pea.
   C. They are present through out life of a plant and provide them whth energy through Glyoxylate cycle.
   D. They are signle membranous organelles

5. Which of the following carbohydrate can not be hydrolysed__________________?

   A. Monosaccharide
   B. Oligosaccharide
   C. Polysaccharide
   D. None of these

6. Which of the following bacteria are thick rigid and spiral______________?

   A. Vibrio
   B. Spirillum
   C. Spirochete
   D. Coccus

7. Which of the following statement about alternation of generation in bryophytes is incorrect?

   A. It involves alternation of morphologically different generations
   B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.
   C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
   D. Spore formation occurs through meiosis

8. All of the following are similarities between nervous and endocrine system except:_____________?

   A. Produce chemical messengers
   B. Release chemical messengers in extracellular space
   C. Homestatic in function
   D. Having slow but prolonged effects

9. Which of the following ions are involved in the initiation of nerve impulse_______________?

   A. Na+
   B. K+
   C. Fe
   D. none of these

10. Which of the following is a compensation point:

    A. Leaves respire and utilize O2 and release CO2.
    B. Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.
    C. Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.
    D. Rate of respiration becomes more than rate of photosynthesis.