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Acidophiles

Total questions: 18

Worksheet time: 14mins

Name
Class
Date
1.

What do you call an organism that thrives in acidic environments.

a)

acidophile

b)

endophile

c)

thermophile

d)

Alkaliphile

2.

Which of the following is a correct source where acidophiles are located

a)

Freshwater

b)

Saltwater lakes

c)

Acid mine drainage

d)

Acid rain

3.

Acidophilic bacteria involved in making acetic acid ____

a)

Thiooxidans ferroxidans

b)

Acidophilus thiooxidans

c)

Acetobacter aceti

d)

Thermopasmatales

4.

Which of the following mechanism is used by acidophilies to maintain inner pH?

a)

Apoptosis

b)

Cytolysis

c)

Proton efflux

d)

Phagocytosis

5.

Acidophiles belong to which group of following

a)

Archeae

b)

Eubacteria

c)

Both archeae and eubacteria

d)

None of the above

6.

Acidophile can synthesis pH resisting enzyme like _____

a)

Pepsin

b)

Lipase

c)

Kinase

d)

Trypsin

7.

Impermeability of cell membrane of an acidophile is due to presence of

a)

Tetra ether lipids

b)

Muramic acid

c)

Phospholipids

d)

Sphingo lipids

8.

Genome of ________ is smaller than neutrophiles

a)

Barophiles

b)

Psycrophiles

c)

Acidophiles

d)

Thermophiles

9.

Which is the best place to find acidophiles

a)

Drainage

b)

Arctic ocean

c)

Salt lake

d)

Hydrothermal vents

10.

Despite environment being acidic acidophiles manages to keep their internal pH near to neutral because of

a)

DNA repair system

b)

Chemotaxis

c)

Impermeability of cell wall

d)

Phagocytosis

11.

Acidthiobacillus ferooxidans cell membrane consists ___________ fatty acids

a)

Cyclopropane

b)

Beta hydroxy

c)

Omega cyclohexyl

d)

None of the above

12.

Which planet would host the life of an acidophile?

a)

Venus

b)

Earth

c)

Neptune

d)

Jupiter

13.

Bacteria that causes gastritis thought to be an acidophile but in fact it is a neutrophile.

a)

Helicobacter pylori

b)

Staphilococcus aureus

c)

Escherichia coli

d)

Lactobacillus casei

14.

In acidophilic bacteria, multiple systems having the same physiological role are operating at different cytoplasmic pH values.

a)

True

b)

False

c)

Partially true

15.

Acid stable proteins are,

a)

soxF

b)

DnaK

c)

NAPase

d)

DHFR

16.

Chaperones that protect enteric bacteria from acidic conditions are

a)

HdeA

b)

soxF

c)

DHFR

d)

HdeB

17.

Extreme pH affects the macromolecules such as

a)

Proteins

b)

Carbohydrates

c)

Nucleic acid

d)

All of these

18.

Proton pump actively removes ________ from cell to maintain internal pH.

a)

K+

b)

Na+

c)

H+

d)

OH-