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Biology Test

Description: AIIMS - Get complete study material for AIIMS Chemistry, AIIMS Physics, AIIMS Biology, AIIMS Entrance, AIIMS Exam, AIIMS Test, AIIMS, Medical Entrance, B.Sc., Class XI, Class XII
Number of Questions: 25
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Tags: AIIMS Chemistry AIIMS Physics AIIMS Biology AIIMS Entrance AIIMS Exam AIIMS Test AIIMS Medical Entrance B.Sc. Class XI Class XII Species Interdependence Population Interactions Environmental Issues Energy Flow Components of Ecosystem Important Components of Ecosystem Hierarchy of Categories Taxonomical Hierarchy
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Increase in atmospheric temperature due to CO2 is called

  1. pasteur effect

  2. green-house effect

  3. blackman effect

  4. emerson effect


Correct Option: B

The flow of energy among various trophic levels of an ecosystem is

  1. unidirectional

  2. bidirectional

  3. multidirectional

  4. circular


Correct Option: A

The protective-ozone layer is present in

  1. ionosphere

  2. stratosphere

  3. troposphere

  4. lithosphere


Correct Option: B

Decomposition of organic matter is brought about by

  1. protozoa

  2. plants

  3. micro-organisms

  4. None of these


Correct Option: C

Which was the first National Park of India?

  1. Kanha National Park

  2. Periyar National Park

  3. Corbett National Park

  4. Bandipur National Park


Correct Option: C
Explanation:

The first National Park in India was set up in 1935 in the foot hills of Himalayas and was known as Hailey National Park. It is now known as Corbett National Park.

Virus consists of

  1. nucleic acid and protein

  2. nucleic acid

  3. orotein

  4. None of these


Correct Option: A

In Whittaker's system of classification, prokaryotes are placed in the kingdom

  1. Protista

  2. Monera

  3. Plantae

  4. Animalia


Correct Option: B

Which one of the following has ssRNA?

  1. TMV

  2. T2-bacteriophage

  3. Polio Virus

  4. CMV


Correct Option: A
Explanation:

Tobacco mosaic virus (TMV) is a rigid rod-shaped ssRNA-containing virus that causes distortion and blistering of leaves in a wide range of plants.

Sea mouse belongs to phylum

  1. mollusca

  2. cnidaria

  3. arthropoda

  4. annelida


Correct Option: D

One of the following animal belongs to Cyclostomata is

  1. channa

  2. loris

  3. dodo

  4. petromyzon


Correct Option: D

In an interaction between two species, if the stronger partner is benefited and the weaker partner is damaged, it is known as

  1. predation

  2. allelopathy

  3. symbiosis

  4. commensalism


Correct Option: A

The highest degree of polymorphism is found in

  1. protozoa

  2. cnidaria

  3. platyhelminthes

  4. arthropoda


Correct Option: B
Explanation:

A striking feature of cnidarians is the high degree of polymorphism often seen in a single species. Two basic types—sessile polyp and free-swimming medusa-occur.

The smallest taxon is called

  1. class

  2. order

  3. genus

  4. species


Correct Option: D

Which, out of the following substances, is present in the cell walls of Gram Positive bacteria only?

  1. Peptidoglycan

  2. Lipopolysaccharides

  3. Teichoic acids

  4. None of these


Correct Option: A

Acid rain is mainly caused due to increase in the levels of

  1. SO2 only

  2. CO2 only

  3. SO2 and CO2

  4. NO2 and SO2


Correct Option: D
Explanation:

Acid rain results from the emission into the atmosphere of various pollutant gases in particular sulphur dioxide (SO2) and oxides of nitrogen (NO2), which originate from the burning of fossil fuels and from motor-car exhaust fumes, respectively.

Which one of the following is absent in sharks?

  1. Claspers

  2. Placoid scales

  3. Cartilaginous endoskeleton

  4. Air bladder


Correct Option: D
Explanation:

Members of Elasmobranchii subclass have no swim (air) bladders.

The devil fish and sea hare are

  1. molluscs

  2. crustaceans

  3. coelenterates

  4. marine fish and mammal


Correct Option: D

Endothelium of blood vessels is made up of

  1. simple cuboidal epithelium

  2. simple squamous epithelium

  3. simple columnar epithelium

  4. simple non-ciliated columnar


Correct Option: B

An egg laying mammal is

  1. delphinus

  2. macaca

  3. ornithorhynchus

  4. macropus


Correct Option: C

In humans, sphincter of Oddi is associated with the opening of

  1. common hepatopancreatic duct

  2. pyloric stomach

  3. oesophagus

  4. colon


Correct Option: A

In human beings, the duration of cardiac cycle is

  1. 0·08 second

  2. 0·5 second

  3. 0·8 second

  4. 8·0 second


Correct Option: C

The largest subunit of prokaryotic ribosomes is

  1. 30S

  2. 40S

  3. 50S

  4. 60S


Correct Option: C

Which of the following is a part of endomembrane system of eukaryotic cell?

  1. Peroxisomes

  2. Chloroplasts

  3. Mitochondria

  4. Golgi complexes


Correct Option: D
Explanation:

Golgi complex is a part of endomembrane system, which is the system of internal membranes within eukaryotic cells that divide the cell into functional and structural compartments, or organelles.

In which part of nephron is reabsorption minimum from filtrate?

  1. Henle's loop

  2. Proximal convoluted tubule

  3. Distal convoluted tubule

  4. Collecting duct


Correct Option: C

Which hormone reaches its peak during the luteal phase of menstrual cycle?

  1. Luteinizing hormone

  2. Progesterone

  3. Follicle stimulating hormone

  4. Estrogen


Correct Option: B
Explanation:

 Progestrone reaches its peak during luteal phase of menstrual cycle.

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