Subject Specialist Botany MCQS Past Papers pdf

Botany MCQs
Botany MCQs Past Papers of SS Subject Specialist in pdf. SS Botany Solved mcqs notes downlad in pdf.

(i) NADH from the Krebs cycle is approximately equal to:
(a) 2 ATP
(b) 3 ATP
(c) 4 ATP
(d) 6 ATP
(e) None of these

Answer: (e) None of these

(ii) In mitochondrial electron transport chains, the final acceptor is:
(a) H2O
(b) H2O2
(c) NAD+
(d) FAD
(e) None of these

Answer: (a) H2O

(iii) The movement of water from cell to cell via plasmodesmata is called:
(a) Symplastic
(b) Transmembrane
(c) Apoplastic
(d) Facilitated
(e) None of these

Answer: (a) Symplastic

(iv) In maize plant, the CO2 fixation mechanism is called pathway:
(a) C3 pathway
(b) C4 pathway
(c) CAM pathway
(d) C3 – C4 intermediate
(e) None of these

Answer: (b) C4 pathway

(v) Salt-loving plants are known as:
(a) Glycophytes
(b) Halophytes
(c) Xerophytes
(d) Mesophytes
(e) None of these

Answer: (b) Halophytes

(vi) With the addition of solution to a liquid system, the water potential of the system:
(a) Increases
(b) Decreases
(c) Remains stable
(d) Remains variable
(e) None of these

Answer: (b) Decreases

(vii) The conversion of pyruvate into acetyl CoA is called:
(a) Glycolysis
(b) Fermentation
(c) Oxidative carboxylation
(d) Beta-Oxidation
(e) None of these

Answer: (c) Oxidative carboxylation

(viii) Between adenine and thymine, there are:
(a) Two hydrogen bonds
(b) Three hydrogen bonds
(c) One hydrogen bond
(d) Four hydrogen bonds
(e) None of these

Answer: (a) Two hydrogen bonds

(ix) The stage of meiosis in which pairing of homologous chromosomes starts is called:
(a) Leptotene
(b) Zygotene
(c) Diplotene
(d) Pachytene
(e) None of these

Answer: (b) Zygotene

(x) The site on a chromosome where a gene is located is called:
(a) Allele
(b) Locus
(c) Site
(d) Trait
(e) None of these

Answer: (b) Locus

(xi) In a dihybrid cross, the ratio of the F2 generation is:
(a) 9:3:3:1
(b) 3:1
(c) 1:2:1
(d) 1:1
(e) None of these

Answer: (a) 9:3:3:1

(xii) When a single gene has multiple effects, the phenomenon is called:
(a) Codominance
(b) Epistasis
(c) Pleiotropy
(d) Genostasis
(e) None of these

Answer: (c) Pleiotropy

(xiii) Lamarck’s theory of evolution was published in:
(a) 1807
(b) 1808
(c) 1809
(d) 1810
(e) None of these

Answer: (d) 1810

(xiv) The book “Origin of Species” was written by:
(a) Linnaeus
(b) Lamarck
(c) Mendel
(d) Darwin
(e) None of these

Answer: (d) Darwin

(xv) The interaction between algae and fungi to form lichen is called:
(a) Parasitism
(b) Mutualism
(c) Commensalism
(d) Amensalism
(e) None of these

Answer: (b) Mutualism

(xvi) The actual location or place where an organism lives is called:
(a) Habitat
(b) Ecosystem
(c) Niche
(d) Biome
(e) None of these

Answer: (a) Habitat

(xvii) Which of the biomes has been increased in area by human activities?
(a) Savanna
(b) Grassland
(c) Desert
(d) Coniferous forest
(e) None of these

Answer: (b) Grassland

(xviii) Which zone of the lake ecosystem consists of phyto- and zooplankton?
(a) Littoral zone
(b) Limnetic zone
(c) Profundal zone
(d) Water deep layers
(e) None of these

Answer: (b) Limnetic zone

(xix) Which of the following is a biotic component of an ecosystem?
(a) Producers
(b) Consumers
(c) Decomposers
(d) All of these
(e) None of these

Answer: (d) All of these

(xx) A sequence of changes in the community structure of an ecosystem over a period of time is called:
(a) Natural selection
(b) Succession
(c) Neo-Darwinism
(d) Lamarckism
(e) None of these

Answer: (b) Succession

Leave a Reply

Your email address will not be published. Required fields are marked *