1_Which metals forms part of the haem group to which oxygen binds in hemoglobin?

a)Zinc

b)Copper

c)Iron

d)Manganese

2_Which of the following metal are involved in the transmission of nerve impulses?

a)Lithium

b)Iron

c)Zinc

d)Potassium

3_In the active sites of many enzymes, metals are coordinated by the amino acid histidine.which element in histidine donates the electrons that form the coordinate bond?

a)Carbon

b)Nitrogen

c)Sulfur

d)Oxygen

4_Which of the following elements are classed as metals?

a)Oxygen

b)Chlorine

c)Lithium

d)iron

5_The most abundant metal in the earth’s crust is

a)Iron

b)Aluminium

c)Calcium

d) Sodium

6_Metal ion accumulated in_____part that can be burnt to recover matals.

a)aerial

b)leaf

c)soil

d)organic

7_Phytofiltration involves plant roots for removal of_________from aqueous wastes.

a)Non_Metals

b)Sediments

c)Metals

d)None of there

8_Heavy metals ions are known to be very________?

a)Carcinogenic

b)Non_toxic

c)toxic

d)both a,b

9_Phytoremediation uses________to binds, extract and clean up pollutants.

a)Metals

b)Plants

c)pesticides

d)bacteria

10_Shoot is harvested to recover the___________.

a)Contaminants

b)ore

c)metals

d)chemicals

11_Uptake of contaminants also accelerate by use of_________.

a)Accumulator

b)Filtration

c)Phytostabilizer

d)Hyperaccumulation

12_Mercuric ion may be transformed into a less toxic substance.

a)Methyl mercury

b)Elemental Hg

c)Chromium

d)Zinc & copper

13_Willow tree absorb______.

a)Zinc & copper

b)Chromium

c)lead

d)Aluminium

14_Heavy metals are.

a)biodegradable

b)non_toxic

c)highly effective

d)none of above

15_Which of them are heavy metal.

a)Copper

b)selearium

c)Zinc

d)All of these

16_Which heavy metal is essential to maintain metabolism.

a)copper

b)Chromium

c)Aluminium

d)Non of there

17_Some metals are intentionally added.

a)as contaminent

b)as ingrediants

c)as waste product

d)None of above

18_Which of these are Biorwmidiator.

a)Bacteria

b)Archaea

c)Fungi

d)All of these

19_The physiological and biochemical properties of microorganisms can be altered by the presence of.

a)non_metals

b)heavy metals

c)organic pollutants

d)toxic chemical

20_Microorganisms like, fungi converts heavy metals into________compounds and utilize them for their growth.

a)less toxic

b)more toxic

c)toxic chemical

d)Non_metalic

21_Heavy metals are extremely sensitive at_______?

a)High concentration

b)Low concentration

c)Biochemical level

d)Physiological level

22_Different concentration of_________commonly occur in all ecosystem.

a)Organic compounds

b)inorganic compounds

c)heavy metals

d)minerals

23_ __________heavy metals concentration in water is vital to the quality of aquatic living organisms.

a)Alleviating

b)intensify

c)Aggravate

d)incite

24_The growth slows down when__________is deficient in the environment.

a)Copper

b)Zinc

c)Manganese

d)Iron

25_The___________source of Cu element are mostly found in pollution site from landfills mine site combustion of fossil fuels and domestic wastewater.

a)antropogenic

b)natural

c)compatible

d)improper

26_Which metal cause the toxic and carcinogenic effects?

a)Iron

b)Aluminium

c)Copper

d)Nickel

27______________is a conventional methods which is used for removing of heavy metal contamination.

a)Chemical method

b)Biological method

c)Neutralization method

d)Both a , b