Biology Test 161

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Biology Test 161

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Weekly Quiz Competition

Question 1
4 / -1

A bacterium divides every 30 minutes. If a culture containing 10⁶ cells/ml is grown for 180 minutes, what will be bacterial cell concentration after that period :-

A
64 × 10⁵

B
64 × 10⁶

C
32 × 10⁶

D
128 × 10⁶
Question 2
4 / -1

Bacteria that fix CO₂ without using light energy as source are :

A
Chemoheterotrophs

B
Chemoautotrophs

C
Photoheterotrophs

D
Photoautotrophs
Question 3
4 / -1

Which of the following is Xanthomonas related ?

A
Xanthophyceae

B
Causing disease in xanthium

C
A kind of virus

D
Causing citrus disease
Question 4
4 / -1

Which of the following statements is/are correct?

(I) Mycoplasma has no cell wall

(II) Mycoplasma is the smallest living organism

(III) Mycoplasma cannot survive without O₂.

(IV) Mycoplasma are pathogenic in animals and plants

(V) True sexuality is not found in bacteria

(VI) A sort of sexual reproduction by adopting a primititive DNA transfer from one bacterium to the other occur

A
All of the above

B
Only III

C
I, II, IV, V, VI

D
I, III, VI

Question 5

4 / -1

Column–I	Column-II
(I) Streptomyces	(A) Nitrogen fixation
(II) Rhizobium	(B) Source of antibiotics
(III) Nitrosomonas	(C) Vinegar synthesis
(IV) Acetobacter	(D) Nitrification

Which of the combinations is correct ?

Question 6
4 / -1

Which of the following kingdom forms a link with the others dealing with plants, animals and fungi?

A
Monera

B
Protista

C
Archaebacteria

D
Fungi
Question 7
4 / -1

'Red tides' are due to -

A
Red algae

B
Dinoflagellates

C
Diatoms

D
Brown algae
Question 8
4 / -1

Flexibility of Euglenoids body is due to :

A
Plasma membrane

B
Cellulosic membrane

C
Pellicle

D
Glycocalyx
Question 9
4 / -1

(A) Marine form of Amoeba have silica

(B) Silica present in Diatom

(C) Lichens are pollution indicator

(D) Citric acid can produced form Aspergillus niger.

A
A, B, C, D all are correct

B
Only B, C, D are correct

C
Only A, B, D are correct

D
Only A, C, D are correct

Question 10

4 / -1

Select incorrect matches from the followings :-

	Column I	Column II
(i)	Haplontic life cycle	Gametic meiosis
(ii)	Diatoms	Bioluminescence
(iii)	Frustule	Silicated cell wall
(iv)	Slime mould	Plasmodium

(iii) & (iv)

(i) & (ii)

(i), (ii) & (iii)

(ii), (iii) & (iv)

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Re-Attempt Weekly Quiz Competition

Biology Test 161

Result

Biology Test 161

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SHARING IS CARING

Question 1

64 × 105

64 × 106

32 × 106

128 × 106

Question 2

Chemoheterotrophs

Chemoautotrophs

Photoheterotrophs

Photoautotrophs

Question 3

Xanthophyceae

Causing disease in xanthium

A kind of virus

Causing citrus disease

Question 4

All of the above

Only III

I, II, IV, V, VI

I, III, VI

Question 5

Question 6

Monera

Protista

Archaebacteria

Fungi

Question 7

Red algae

Dinoflagellates

Diatoms

Brown algae

Question 8

Plasma membrane

Cellulosic membrane

Pellicle

Glycocalyx

Question 9

A, B, C, D all are correct

Only B, C, D are correct

Only A, B, D are correct

Only A, C, D are correct

Question 10

(iii) & (iv)

(i) & (ii)

(i), (ii) & (iii)

(ii), (iii) & (iv)

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64 × 10⁵

64 × 10⁶

32 × 10⁶

128 × 10⁶