WBCS Mains Biology Botany & Plant Physiology Questions 2023

Q. Reindeer moss is actually a member of
(A) Algae
(B) Fungi
(C) Bryophyte
(D) Lichen

Correct Answer: (D) Lichen

Q. Liberica excelsa, which was seen in the news, belongs to which species?
(A) Tea
(B) Coffee
(C) Rice
(D) Wheat

Correct Answer: (B) Coffee

Q. The water which is available to plant roots is
(A) Gravitational water
(B) Chemically combined water
(C) Hygroscopic water
(D) Capillary water

Correct Answer: (D) Capillary water

WBCS Mains Biology Botany & Plant Physiology Questions 2022

Q. An endobiotic fungus is
(A) Agaricus
(B) Morchella
(C) Synchytrium
(D) Polyporus

Correct Answer: (C) Synchytrium

WBCS Mains Biology Botany & Plant Physiology Questions 2021

Q. Deficiency of which element causes chlorosis?
(A) Magnesium
(B) Calcium
(C) Chlorine
(D) Sodium

Correct Answer: (A) Magnesium

Q. Sunlight arrives at a plant in units of light energy called
(A) Protons
(B) Photons
(C) Electrons
(D) Wavelength

Correct Answer: (B) Photons

WBCS Mains Biology Botany & Plant Physiology Questions 2020

Q. The xylem in plants are responsible for
(A) Transport of water
(B) Transport of food
(C) Transport of amino acids
(D) Transport of oxygen

Correct Answer: (A) Transport of water

Q. Which of the following is a plant hormone?
(A) Insulin
(B) Thyroxin
(C) Oestrogen
(D) Cytokinin

Correct Answer: (D) Cytokinin

Q. The anther contains
(A) Sepals
(B) Ovules
(C) Pistil
(D) Pollen grains

Correct Answer: (D) Pollen grains

WBCS Mains Biology Botany & Plant Physiology Questions 2019

Q. Which is the first plant grown on the Moon?
(A) Cotton
(B) Potatoes
(C) Arabidopsis
(D) Canola

Correct Answer: (A) Cotton

Q. The following organism is an endosymbiont:
(A) Anabaena
(B) Azotobacter
(C) Clostridium
(D) Nitrobacter

Correct Answer: (A) Anabaena

Q. The following is not a macronutrient:
(A) Mg
(B) Ca
(C) Fe
(D) K

Correct Answer: (C) Fe

Q. Loss of water is maximum from
(A) Leaf surface
(B) Soil surface
(C) Root
(D) Stem surface

Correct Answer: (A) Leaf surface

Q. Mulching prevents the loss of
(A) Microbes
(B) Moisture
(C) Mineral
(D) Organic matter

Correct Answer: (B) Moisture

Q. Indusium is found in
(A) Algae
(B) Moss
(C) Ferns
(D) Cycas

Correct Answer: (C) Ferns

Q. In plants, water supply is due to
(A) Osmosis
(B) Imbibition
(C) Guttation
(D) Adhesion force

Correct Answer: (A) Osmosis

Q. In which form is food transported in plants?
(A) Sucrose
(B) Fructose
(C) Glucose
(D) Lactose

Correct Answer: (A) Sucrose

WBCS Mains Biology Botany & Plant Physiology Questions 2018

Q. Quinine is extracted from the plant of
(A) Poppy
(B) Cinchona
(C) Sandalwood
(D) Palm

Correct Answer: (B) Cinchona

Q. Plant absorbs dissolved nitrates from soil and converts them into
(A) Free N₂
(B) Urea
(C) Ammonia
(D) Proteins

Correct Answer: (D) Proteins

Q. If an enzyme fixes nitrogen in plant by evolving H₂, the number of electrons and protons associated with respectively are
(A) 6 and 6
(B) 6 and 8
(C) 8 and 8
(D) 8 and 6

Correct Answer: (C) 8 and 8

Q. The method by which desired characters of two plants can be combined is
(A) Cutting
(B) Layering
(C) Budding
(D) Grafting

Correct Answer: (D) Grafting

Q. Chlorophyll contains
(A) Zinc
(B) Iron
(C) Magnesium
(D) Cobalt

Correct Answer: (C) Magnesium

Q. In photosynthesis, chlorophyll of green plants reacts with CO₂ and H₂O in the presence of sunlight to generate
(A) N₂
(B) O₂
(C) H₂
(D) Cl₂

Correct Answer: (B) O₂

WBCS Mains Biology Botany & Plant Physiology Questions 2017

Q. Leaf spot disease of rice is caused by
(A) Fungus
(B) Bacteria
(C) Virus
(D) None of the above

Correct Answer: (A) Fungus

Q. Black heart of potato is due to
(A) Deficiency of copper
(B) Deficiency of boron
(C) Deficiency of oxygen
(D) Deficiency of potassium

Correct Answer: (C) Deficiency of oxygen

Q. The cell wall of xylem cells is rich in
(A) Starch
(B) Protein
(C) Lipid
(D) Lignin

Correct Answer: (D) Lignin

Q. Growth movement in plant due to light is called
(A) Thigmotropism
(B) Phototropism
(C) Geotropism
(D) Hydrotropism

Correct Answer: (B) Phototropism

Q. Red colour of Red Sea is due to
(A) Moss
(B) Bacteria
(C) Fungi
(D) Algae

Correct Answer: (D) Algae

Q. Spermology is the study of
(A) Leaf
(B) Pollen grain
(C) Fruit
(D) Seed

Correct Answer: (D) Seed

WBCS Mains Biology Botany & Plant Physiology Questions 2016

Q. Rosy Periwinkle gives the drug for
(A) Malaria
(B) Blood cancer
(C) Hypertension
(D) Anaemia

Correct Answer: (B) Blood cancer

WBCS Mains Biology Botany & Plant Physiology Questions 2015

Q. Which is not true about preserved mushrooms?
(A) Russia is the leading player in mushroom production
(B) Mushrooms are preserved by blanching, cleaning and sometimes slicing
(C) They are very nutritious, rich in fibre and proteins
(D) They have a high content of folic acid, which is uncommon in vegetables

Correct Answer: (A) Russia is the leading player in mushroom production