Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following is an edible fungus?

  • Agaricus

  • Albugo

  • Rhizopus

  • Puccinia


A.

Agaricus

Agaricus is an edible mushroom. It is a saprophytic fungus, which grows during rainy season, in moisture grassy places and in richly manured unploughed fields.


2.

The lack of fruit formation in gymnosperm is due to

  • absence of fertilization

  • lack of seeds

  • naked ovule

  • sheding of immature seed


C.

naked ovule

In Gymnosperms, ovule lacks ovary and ovary wall that forms fruit after maturation in Angiosperms.


3.

In living beings ammonia is converted into urea through

  • ornithine cycle

  • citrulline cycle

  • fumarine cycle

  • arginine cycle


A.

ornithine cycle

Ornithine combines with one molecule of NH3 and CO2 to produce citrulline. Citrulline combines with another molecule of NH3 to form arginine. Arginine is broken down into urea and ornithine which repeats the cycle.


4.

A secretion that digests both carbohydrates and proteins is

  • ptyalin

  • pepsin

  • pancreatic juice

  • saliva


C.

pancreatic juice

Pancreatic juice acts upon both carbohydrates and proteins.


5.

Total number of bones in the hind limb of a man is

  • 21

  • 23

  • 27

  • 30


D.

30

Hind limb of man consists of 30 bones which are as follows:

  1. Femur- 1
  2. Fibula- 1
  3. Tibia- 1
  4. Patella- 1
  5. Tarsals-7
  6. Metatarsals- 5
  7. Phalanges- 14


6.

In gametophyte of fern

  • prothallus is independent from sporophyte

  • prothallus is attached with sporophyte

  • it is main plant body

  • a structure attached with rhizome


A.

prothallus is independent from sporophyte

A gametophyte is the plant that produces gametes. The fern gametophyte is a small, bisexual, heart- shaped plant called a prothallus. Sporophyte is the asexual and usually diploid phase that produces spores from which the gametophyte arises. A fern gametophyte prothallus is independent from sporophyte.


7.

A definite number of segments are found in

  • slug

  • earthworm

  • leech

  • tapeworm


C.

leech

Leech belongs to Phylum- Annelid. A definite number of segments, ie, 33 segments are found in leech.


8.

Blue- green algae is found in

  • Cycas

  • Pinus

  • Scales of Marchantia

  • Riccia


A.

Cycas

The coralloid roots of Cycas has an algal zone which consists of Blue- Green algae Anabaena cycadeal and Nostoc punctiforme.


9.

Turpentine oil is obtained from

  • Pinus

  • Cycas

  • Cedrus

  • Delbergia


A.

Pinus

Turpentine is a fluid obtained by the distillation of resin from Pinus pinaster trees.


10.

Biologically most resistant plant material is

  • sporopollenin

  • cutin

  • lignin

  • suberin


A.

sporopollenin

Sporopollenin is biologically most resistant plant material and is present in pollen exine. It is contributed by the tapetum layer of the another wall.