0

Biology

Description: Online Complete study material for Class XII Biology, Science, Biology, Biology Notes, Biology Test, Biology Test Papers, Test Papers for Class XII Biology Questions, Medical Entrance,Medical Biology, AIIMS, CBSE Biology, Medical Entrance Biology
Number of Questions: 25
Created by:
Tags: Class XII Biology Science Biology Biology Notes Biology Test Biology Test Papers Class XII Biology Questions Medical Entrance Medical Biology AIIMS CBSE Biology Medical Entrance Biology Protein Synthesis Translation Pollination Seed Fruit Devices of Pollination Photosystems Photosynthetic Systems in Plants
Attempted 0/25 Correct 0 Score 0

Outer wall of pollen grain is made up of

  1. sporopollenin

  2. lignin

  3. suberin

  4. cutin


Correct Option: A

Oxalis and viola are

  1. chasmogamous flowers

  2. cleistogamous flowers

  3. dichogamous flowers

  4. heterostylous flowers


Correct Option: B

A fruit is described as false fruit when

  1. thalamus fuses with ovary

  2. pericarp becomes papery

  3. only mesocarp is the edible part

  4. all the above


Correct Option: A

EMP stands for

  1. Electron Motor Pump

  2. Engler-Mendel-Prantl

  3. Embeden-Meyerhof-Parnas

  4. None of these


Correct Option: C

A DNA strand is directly involved in the synthesis of all of the following except

  1. DNA replica

  2. protein molecule

  3. tRNA molecule

  4. mRNA molecule


Correct Option: B

Awn is produced by

  1. glume

  2. palea

  3. lemma

  4. lodicules


Correct Option: C

Which of the following events is absent in a choloroplast devoid of photosystem II?

  1. Photolysis of water

  2. Synthesis of ATP

  3. Photoexcitation

  4. Electron transfer


Correct Option: A

Chlorophyll molecule is _____ shaped.

  1. top

  2. kite

  3. cylinder

  4. kidney


Correct Option: B

The first product formed in Krebs cycle is

  1. acetyl CoA

  2. citric acid

  3. succinic acid

  4. iso-citrate


Correct Option: B

The placentation in sorghum is

  1. axile

  2. parietal

  3. central

  4. basal


Correct Option: D

Which of the following groups is known as the amphibian of the plant kingdom?

  1. Gymnosperms

  2. Bryophytes

  3. Angiosperms

  4. Pteridophytes


Correct Option: B

Heterospory is production of

  1. sexual and asexual spores

  2. large and small spores

  3. haploid and diploid spores

  4. sporophytic and gametophytic spores


Correct Option: B

Pollen kit is present in the pollens of ________flowers.

  1. anemophilous

  2. hydrophilous

  3. entomophilous

  4. ornithophilous


Correct Option: C
Explanation:

 Pollen kit is present in the pollens of entomophilous flowers.

In maize grains, aleurone layer

  1. has fats

  2. is proteinaceous

  3. has carbohydrates

  4. has sporopollenin


Correct Option: B

In Hibiscus, the staminal tube encloses

  1. ovary and style

  2. style and stigma

  3. stigma and ovary

  4. ovary, style and stigma


Correct Option: A

Chemical composition of ribosome is

  1. DNA and RNA

  2. RNA and proteins

  3. DNA, RNA and Proteins

  4. DNA and histones


Correct Option: B

Bringing the cultivating plants in regions where they do not exist is called

  1. pure selection

  2. mass selection

  3. hybridization

  4. plant introduction


Correct Option: D

Energy plantation differs from energy cropping in being

  1. the source of fuel wood

  2. renewable

  3. a substitute to petrol

  4. exportable


Correct Option: A

Population of gypsy moth can be controlled by

  1. Bacillus thuringiensis

  2. Cactoblastis cactorum

  3. Phytopthora infestans

  4. Bacillus subtilis


Correct Option: A

Which of the following is obtained from chrysanthemum?

  1. Hallucinogens

  2. Insectides

  3. Growth hormones

  4. Fertilizers


Correct Option: B

Jumping genes are referred as

  1. exons

  2. introns

  3. mutons

  4. transposons


Correct Option: D

Inner membrane of mitochondria has

  1. quantasomes

  2. nucleosomes

  3. oxysomes

  4. chromosomes


Correct Option: C

For chlorophyll formation, which two elements are needed?

  1. Iron and calcium

  2. Calcium and magnesium

  3. Nitrogen and magnesium

  4. Sodium and chloride


Correct Option: C

The hydrogen donor in bacterial photosynthesis is

  1. water

  2. hydrogen sulphide

  3. sulphuric acid

  4. ammonia


Correct Option: B

Which plant root contains red pigment having affinity for oxygen?

  1. Carrot

  2. Soybean

  3. Mustard

  4. Radish


Correct Option: B
Explanation:

Correct Answer: Soybean

- Hide questions