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Free download in PDF Botany Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
A nucleoside is:
[A]
purine/pyramidine + sugar
[B]
purine/pyramidine + phosphate
[C]
Pyramidine + purine + phosphate
[D]
Purine + sugar + phosphate
Answer: purine/pyramidine + sugar
(2)
In angiosperms regarding development of microgametophyte each microspore mother cell undergoes
[A]
Two successive meiotic division to form 4 microspores
[B]
Meiosis to produce 4 haploid microspores
[C]
Two successive mitosis to form 4 microspores
[D]
Mitosis to produce 4 microspores
Answer: Meiosis to produce 4 haploid microspores
(3)
Pmcess of water exudation through hydathodes is known as:
[A]
Transpiration
[B]
Bleeding
[C]
Guttation
[D]
None of the above
(4)
Insectivorous plants grow in:
[A]
Nitrogen deficient soil
[B]
Nitrogen rich soil
[C]
Potassium deficient soil
[D]
Carbohydrate rich soil
Answer: Nitrogen deficient soil
(5)
The organelles involved in photorespiration are
[A]
Mitochondria, peroxisome and glyoxysomes
[B]
Chloroplast, mitochondria and peroxisome
[C]
Glyoxysomes, chloroplast and mithondria
[D]
Chloroplast, peroxisome and glythisome
Answer: Chloroplast, mitochondria and peroxisome
(6)
? X l74 has:
[A]
Single stranded DNA
[B]
Single stranded RNA
[C]
Double stranded RNA
[D]
Double stranded DNA
Answer: Single stranded DNA
(7)
Floridean starch is found in:
[A]
Phaeophyceae
[B]
Rhodophyceae
[C]
Chlorophyceae
[D]
Myxophyceae
(8)
In bryoph4tes the female sex organ is called:
[A]
Archegonium
[B]
Ascogonium
[C]
Antheridium
[D]
Carpogonium
(9)
The two great industrial tragedies MIC and Chemobyl occurred respectively in:
[A]
Ukraine 1990, Bhopal 1986
[B]
Madhya Pradesh 1980, Russia 1990
[C]
Bhopal 1980, Ukraine 1984
[D]
Bhopal 1984, Ukraine 1986
Answer: Bhopal 1984, Ukraine 1986
(10)
If a sporangium derived from a single cell is called
[A]
Heterosporangiate
[B]
Leptosporangiate
[C]
Eusporangiate
[D]
None of the above
(11)
Mary’s biological concept of species is mainly based on:
[A]
Reproductive isolation
[B]
Morphological traits
[C]
Modes of reproduction
[D]
None of the above
Answer: Reproductive isolation
(12)
The process by which the amount of DNA, RNA and protein can be known at a time is:
[A]
Phase-contrast microscopy
[B]
Tissue culture
[C]
Autoradiography
[D]
Cell fractionation
(13)
Sexual reproduction in Rhizopus occurs through:
[A]
Gametangial copulation
[B]
Spermatogamy
[C]
Gametangial contact
[D]
Planogametic copulation
Answer: Gametangial copulation
(14)
Organelles involved in photorespiration are
[A]
Mitochondria, proxisomes and glyoxisomes
[B]
Mitochondria, nucleus and ribosomes
[C]
Mitochondria, Peroxisomes and chloroplasts
[D]
Mitochondria, chloroplasts and ribosomes
Answer: Mitochondria, Peroxisomes and chloroplasts
(15)
Swollen placenta, oblique septum and conniving anthers are characteristics of family:
[A]
Solatiaceae
[B]
Brassicaceae
[C]
Asterácéae
[D]
Poaceae
(16)
The empirical formula for chlorophyll-a is:
[A]
C55 H72 O5N4 Mg
[B]
C35 H72 O5N4 Mg
[C]
C65 H70 O6N4 Mg
[D]
C45 H70 O6N4 Mg
(17)
A fern differ from a moss in prossessing:
[A]
Independent Sporophyte
[B]
Swimming/flagellated anitherozoids
[C]
Flask-shaped archegonia
[D]
Independent gametophyte
Answer: Independent Sporophyte
(18)
Water potential in leaf tissue is “positive” (near zero) during:
[A]
Low transpiration
[B]
Gestation
[C]
Excessive transpiration
[D]
Excessive absorption
(19)
Which of the following pairs are correctly matched?
[A]
Fertile spike —Ophioglossum
[B]
Apophysis—Spirogyra
[C]
Sporangiophore—Equisetum
[D]
Synangium—Psilotum
Answer: Fertile spike —Ophioglossum
(20)
Which of the following are true archaebacteria?
[A]
Extreme halophiles
[B]
Presence of peptidoglycan cell wall
[C]
Extreme thermophyles
[D]
Methanogens
Answer: Extreme halophiles
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