Which of the following statements is incorrect?

1. Prions consist of abnormally folded proteins

2. Viroids lack a protein coat

3. Viruses are obligate parasites

4. Infective constituent in viruses is the protein coat

Subtopic:  Virus, Viroids & Prions |
 78%
From NCERT
NEET - 2019
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Assertion: Diatomaceous earth is used in polishing, filtration of oil and syrups.

Reason: Diatomaceous earth is gritty due to presence of silica.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Kingdom Protista: Chrysophytes |
 87%
From NCERT
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Match the Column-I with Column-II

Column-I

Column-II

(a)

Saprophyte

(i)

Symbiotic association of fungi with plant roots

(b)

Parasite

(ii)

Decomposition of dead organic materials

(c)

Lichens

(iii)

Living on living plants or animals

(d)

Mycorrhiza

(iv)

Symbiotic association algae and fungi

Choose the correct answer from the options given below:

Options: (a) (b) (c) (d)
1. (ii) (iii) (iv)  (i)
2.  (i) (ii) (iii) (iv)
3. (iii) (ii)  (i) (iv)
4. (ii) (i) (iii) (iv)
Subtopic:  Kingdom Fungi: Introduction | Lichens |
 88%
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NEET - 2019
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Which of the following statements is incorrect?

1. Yeasts have filamentous bodies with long thread-like hyphae.
2. Morels and truffles are edible delicacies.
3. Claviceps is a source of many alkaloids and LSD.
4. Conidia are produced exogenously and ascospores endogenously.
Subtopic:  Kingdom Fungi: Introduction |
 61%
From NCERT
NEET - 2019
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Diatomaceous earth is obtained from:

1. Bacillarophyceae

2. Xanthophyceae

3. Rhodophyceae

4. Chrysophyceae

Subtopic:  Kingdom Protista: Chrysophytes |
From NCERT
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Bacterial endotoxin is:
1. A toxic protein that stays inside the bacterial cell
2. A toxic protein that is excreted into the medium
3. Lipopolysaccharide located on the surface of the bacteria
4. None of the above
Subtopic:  Kingdom Monera: Bacterial Classification |
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Viruses that infect bacterial multiplication and cause their lysis, are called:

1. Lysosomes

2. lipolytic

3. lytic

4. lysogenic

Subtopic:  Virus, Viroids & Prions |
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Heterocysts are present in:

1. Riccia

2. Ulothrix

3. Albugo

4. Nostoc

Subtopic:  Kingdom Monera: Bacterial Classification |
 87%
From NCERT
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In most fungi, the cell wall is chiefly made of:

1. cellulose

2. chitin

3. protein

4. lipid

Subtopic:  Kingdom Fungi: Introduction |
 92%
From NCERT
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Nucleic acid is absent in:

1. virus

2. viroid

3. prion

4. mycoplasma

Subtopic:  Virus, Viroids & Prions |
 56%
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