Identify the incorrect statement regarding true bacteria?

1. As a group, they exhibit maximum metabolic diversity

2. Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.

3. Heterotrophic bacteria are the most abundant in nature.

4. Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.

Consider the following statements regarding Mycoplasma:

I. They are a genus of bacteria that have a unique cell wall of their own.

II. In their genetic code UGA codes for tryptophan.

III. None of them is pathogenic to humans.

IV. They have a large genome.

V. They can be killed by penicillins.

VI. They can survive without oxygen

The number of correct statements is:

(1) 1

(2) 2

(3) 3

(4) 4

Diatoms have left behind large amounts of cell wall deposits in their habitat because:

1. They are most abundant in that habitat

2. Their life span is long 

3. Their wall is indestructible

4. The statement is not true

Dinoflagellates:

I. Are mostly marine and photosynthetic.

II. Have a cell wall that has stiff cellulose plates on the outer surface.

III. Have two flagella

IV. Have chloroplasts bound by three membranes

The correct statements are:

(1) I, II and III

(2) I, III and IV

(3) II, III and IV

(4) I, II III and IV

Consider the following characters:

I. Heterotroph organisms

II. A dikaryon stage

III. Cell wall made of chitin

IV. Undergo nuclear mitosis

Which of the above relate to fungi?

(1) I, II and III

(2) I, III and IV

(3) II, III and IV

(4) I, II, III and IV

How many of the following statements regarding fungi are true?

1. 2

2. 3

3. 4

4. 5

Which of the following is not an edible mushroom?

(1) Agaricus bispora

(2) Pleurotus ostreatus

(3) Lentinula edodes

(4) Amantia phalloides

Consider the following characters:

I. Nuclear envelope

II. Membranes lacking sterols

III. 80s ribosomes

IV. split genes

The character not shared by fungi with other eukaryotes is/are:

(1) II alone

(2) IV alone

(3) II and IV only

(4) III and IV only 

Fungi resemble plants in:

(1) Lack of chloroplasts and heterotrophic nutrition

(2) Reproduction by only sexual means

(3) Having a cell wall and vacuoles

(4) Exhibition of bioluminiscence

Identify the characteristic that is unique to fungi:

(1) Cell wall of glucans and chitin

(2) Lack of chloroplasts and heterotrophic nutrition

(3) Mannitol, trehalose and glycogen as storage products.

(4) Having haploid nuclei and production of spores