Botany MCQs

                                                        BOTANY

1.At night, Plants intake __________ and release __________.

1. Oxygen – Carbon dioxide
2. Carbon dioxide – Oxygen
3. Oxygen – Carbon monoxide
4. Carbon monoxide – Oxygen

Ans:Oxygen – Carbon dioxide

2.The source of oxygen in photosynthesis is

1. water
2. salts
3. minerals
4. glucose

Ans:water

3.In night, when photosynthesis is stopped, plants

1. take in Carbon Dioxide
2. take in Oxygen
3. give off Carbon Dioxide
4. give off Oxygen

Ans: give off Carbon Dioxide

4.During photosynthesis, plants

1. take in Carbon Dioxide
2. take in Oxygen
3. give off Carbon Dioxide
4. give off Oxygen

Ans:give off Oxygen

5.Which structure helps in transport of water in plants

1. phloem
2. leaf
3. bark
4. xylem

Ans:xylem

Bacteria are

1. eukaryotes
2. prokaryotes
3. non-living
4. none of these

Ans:prokaryotes

6.Which structure prevent water loss in plants

1. cuticle
2. bark
3. mesophyll
4. leaf

Ans: cuticle

7.Pollination is best defined as

1. germination of pollen grains
2. transfer of pollen from anther to stigma
3. formation of pollen grains
4. none of these

Ans: transfer of pollen from anther to stigma

8.Plants absorb most part of water needed by them through their

1. stem
2. root hairs
3. leaf
4. bark

Ans: root hairs

9.Prokaryotic cell lack

1. nucleolus
2. nuclear membrane
3. both a and b
4. none of these

Ans: both a and b

10.Pulses are a good source of

1. proteins
2. carbohydrates
3. vitamins
4. minerals

Ans: proteins

11.Plants that grow in dry habitat are called

1. hydrophytes
2. xerophytes
3. shrubs
4. herbs

Ans: xerophytes

12.Oxygen released in the process of photosynthesis comes from

1. water
2. oxygen
3. carbon dioxide
4. nitrogen dioxide

Ans: water

13.Phloem tissue is found in

1. liver
2. placenta
3. plants
4. none of these

Ans: plants

14.Plant bends towards the source of light on account of the movement known as

1. geotropism
2. hydrotropism
3. chemotropism
4. phototropism

Ans:  phototropism

15.Among the biotic components of the ecosystem, the producer system is

1. carnivores
2. herbivores
3. plants
4. animals

Ans: plants

16.Which is an example of fungi

1. paramecium
2. euglena
3. penicillium
4. octopus

Ans: penicillium

17.Thread like structures in fungi are called

1. mycelium
2. hyphae
3. sporangium
4. spores

Ans: hyphae

18.The smallest bacteria on earth is

1. mycoplasma
2. E.coli
3. salmonella
4. clostridium

Ans:  mycoplasma

19.Penicillin is obtained from

1. soil
2. bacteria
3. fungi
4. virus

Ans: fungi

20.Fructose is

1. pentose sugar
2. hexose sugar
3. heptose sugar
4. none of thes

Ans: pentose sugar

21.Fructose is

1. milk sugar
2. cereal sugar
3. aldo sugar
4. keto sugar

Ans:  keto sugar

22.In most plants the food is transported in form of

1. fructose
2. sucrose
3. starch
4. glucose

Ans: sucrose

23.How many molecules of carbon dioxide are formed in one Kreb's cycle

1. 2
2. 4
3. 6
4. 1

Ans: 6

24.They are widespread as protective coatings on fruits and leaves

1. cholesterol
2. waxes
3. chitin
4. all of these

Ans: waxes

25.They are present in the underground parts of the plants and stored food

1. leucoplast
2. chromoplast
3. chloroplast
4. stem

Ans: leucoplast

26.Flagella are composed of

1. micro tubules
2. micro filaments
3. intermediate filaments
4. glycoproteins

Ans:  micro tubules

27.Tobacco mosaic virus was crystallized by

1. Pasteur
2. Chamberland
3. Stanely
4. Ivanowski

Ans: Stanely

28.Non-enveloped naked viruses are known as

1. prions
2. bacteriophages
3. oncoviruses
4. virions

Ans: virions

29.Gram +ve bacteria on treatment with crystal violet dye give colour

1. red
2. green
3. purple
4. pink

Ans: purple

30.Malarial parasite is injected into man as

1. sporozoites
2. merozoites
3. zygote
4. none of these

Ans: sporozoites

31.The terms procariotique and eucariotique were proposed by

1. Whittaker
2. Chatton
3. Haeckel
4. Margulis and Schwartz

Ans: Chatton

32.The most common type of asexual reproduction in the fungi is

1. fragmentation
2. spore production
3. budding
4. binary fission

Ans:  spore production

33.Outside the thallus of Marchantia there are special structures called

1. stem tuber
2. rhizoids
3. sporangium
4. none of these

Ans:  rhizoids

34.The vascular plants are termed as

1. tracheophytes
2. bryophytes
3. pteridophytes
4. all of these

Ans:  tracheophytes

35.Higher vascular plants are also called

1. flowering plants
2. seed plants
3. ferns
4. none of these

Ans: seed plants

36.The plants which produce embryo but lack vascular tissues and seeds are placed in

1. bryophytes
2. pteridophytes
3. tracheophytes
4. all of these

Ans: bryophytes

37.Bean shaped cells in plants are

1. mesophyll cells
2. xylem cells
3. phloem cells
4. guard cells

Ans: guard cells

38.Shrinkage of protoplast due to exosmosis of water is

1. imbibition
2. plasmolysis
3. deplasmolysis
4. adhesion

Ans: plasmolysis

39.Which of the following plants are called arthrophytes

1. sphenopsids
2. lycopsids
3. psilopsids
4. pteropsids

Ans: sphenopsids