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Biological Classification · Question 85

AIPMT 2006MCQEasy📈 Topic in 12% papers+4−1
1

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

  1. These are all parasites
  2. These are all unicellular protists
  3. They have flagella
  4. They produce spores

Answer

(2) These are all unicellular protists

Solution

As per NCERT, all single-celled eukaryotes are placed under Protista.

∵ Trypanosoma and Giardia are flagellated protozoans, Noctiluca is a dinoflagellate and Monocystis is a sporozoan ⇒ all are unicellular protists.

∵ Noctiluca is free-living (not a parasite), Monocystis has no flagella, and only the sporozoan forms spores ⇒ options (1), (3) and (4) are wrong.

Answer: (2)

AIPMT 2006

Keep practising — Biological Classification

2

The causative agent of mad-cow disease is a-

  1. Virus
  2. Bacterium
  3. Prion
  4. Worm
AIPMT 2006
3

The bacterium ( Clostridium botulinum) that causes botulism is-

  1. A facultative aerobe
  2. An obligate aerobe
  3. A facultative anaerobe
  4. An obligate anaerobe
AIPMT 2006
4

Barophilic prokaryotes

  1. grow and multiply in very deep marine sediments
  2. occur in water containing high concentrations of barium hydroxide
  3. readily grow and divide in sea water enriched in any soluble salt of barium
  4. grow slowly in highly alkaline frozen lakes at high altitudes.
AIPMT 2005
5

There exists a close association between the alga and the fungus within a lichen. The fungus

  1. provides protection, anchorage and absorption for the alga
  2. provides food for the alga
  3. fixes the atmospheric nitrogen for the alga
  4. releases oxygen for the alga
AIPMT 2005
6

Auxospores and hormogonia are formed, respectively, by

  1. some diatoms and several cyanobacteria
  2. some cyanobacteria and many diatoms
  3. several cyanobacteria and several diatoms
  4. several diatoms and a few cyanobacteria.
AIPMT 2005
7

Match items in column I with those in column II. Select the correct answer from the following.

  1. (A) - (L); (B) - (J); (C) - (M); (D) - (N); (E) - (K)
  2. (A) - (K); (B) - (J); (C) - (L); (D) - (M); (E) - (N)
  3. (A) - (N); (B) - (L); (C) - (K); (D) - (N); (E) - (J)
  4. (A) - (J); (B) - (K); (C) - (N); (D) - (L); (E) - (K)
AIPMT 2005
8

Which of the following unicellular organisms has a macronucleus for trophic function and one or more micronuclei for reproduction?

  1. Euglena
  2. Amoeba
  3. Paramecium
  4. Trypanosoma
AIPMT 2005
9

Which of the following statements is not true for retroviruses?

  1. DNA is not present at any stage in the life cycle of retroviruses.
  2. Retroviruses carry gene for RNA-dependent DNA polymerase.
  3. The genetic material in mature retroviruses is RNA.
  4. Retroviruses are causative agents for certain kinds of cancer in man.
AIPMT 2004
10

Viruses that infect bacteria multiply and cause their lysis, are called

  1. lysozymes
  2. lipolytic
  3. lytic
  4. lysogenic
AIPMT 2004
11

Lichens are well known combination of an alga and a fungus where fungus has

  1. a saprophytic relationship with the alga
  2. an epiphytic relationship with the alga
  3. a parasitic relationship with alga
  4. a symbiotic relationship with alga
AIPMT 2004

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