Kerala Plus One Botany Question Paper June 2022 with Answers

Teachers recommend solving Kerala Syllabus Plus One Botany Previous Year Question Papers and Answers Pdf June 2022 to improve time management during exams.

Kerala Plus One Botany Previous Year Question Paper June 2022

I. Answer any three questions from 1 to 4. Each carries 1 score. (3 × 1 = 3)

Question 1.
Fill in the blank.
Diffusion of water across a differentially or selectively Permeable membrane is ____.
Answer:
Osmosis

Question 2.
Choose the correct answr. Reserve Food in Phaeophyceae (Floridean starch, Mannitol, Starch, Algin)
Answer:
Mannitol

Question 3.
Observe the first pair and fill the blank.
Light reaction: Grana
Dark reaction: ____
Answer:
Stroma

Question 4.
Name the process which is common for both aerobic and anaerobic respiration.
Answer:
Glycolysis

II. Answer any 9 questions from 5 to 17. Each carries 2 scores. (9 × 2 = 18)

Question 5.
Plants adapted to dry tropical regions exhibit C₄ pathway.
(a) Name the first CO₂ acceptor in C₄ Pathway.
(b) Which is the first stable product formed in C₄ Pathway?
Answer:
a) PEP (Phospho enol Pyruvic acid)
b) OAA (Oxalo Acetic Acid)

Question 6.
Define Mycorrhiza. How is Mycorrhizal associaton helpful to plants?
Answer:
Mvcorrhiza
It is the syymbiotic association between fungi and roots of higher plants like pinus. Due to the presence of large surface area of hyphae, they helps to absorb water and minerals from soil Roots in turn gives sugar & N- containing compounds to fungus.

Question 7.
Differentiate between long day plants and short day plants.
Answer:

1. Long day plants : They require the exposure to light for a period greater than critical duration (12 hr) before flowering.
2. Short day plants: They require the exposure to light for a period less than critical duration before the flowering.

Question 8.
Match the following:

A	B
a) Bryophytes	i) Double Fertilisation
b) Pteridophytes	ii) Protonema
c) Gymnosperms	iii) Prothallus
d) Angiosperms	vi) Naked seeded

Answer:

A	B
a) Bryophytes	Protonema
b) Pteridophytes	Prothallus
c) Gymnosperms	Naked seeded
d) Angiosperms	Double Fertilisation

Question 9.
List out the four components of xylem in angiosperms.
Answer:

1. Xylem vessels.
2. Xylem tracheids.
3. Xylem parenchyma & Xylem fibres.

Question 10.
Given below are certain processes that occur during the differnt phases of Prophase I in meiotic division. Arrange them against appropriate stages provided in the table.
• Crossing over
• Formation of synapsis
• Terminilisation of Chiasmata
• Dissolution of synaptomal complex.
Answer:

(a) Zygotene	Formation of synapsis
(b) Pachytene	Crossing over
(c) Diplotene	Dissolution of synaptonemal complex
(d) Diakinesis	Terminalisation of chiasmata

Question 11.
Write any two uses of Bacteria.
Answer:

• It helps in the conversion of milk to curd.
• It helps in the production of antibiotics.

Question 12.
Define Respiratory Quotient. Write the RQ value of Carbohydrate.
Answer:
Respiratory quotient It is the ratio of volume of CO₂ evolved to the volume of O₂ constimed in respiration
RQ of carbohydrate = 1

Question 13.
List out the four stages of M phase of cell cycle in correct sequential order.
Answer:
Prophase, Metaphase, Anaphase, Telophase

Question 14.
Observe the given diagram of Mitochondria.
(a) Identify and label parts A and B.
(b) Why Mitochondria is known as the power house of the cell?

Answer:
a) (A) Matrix
(B) Crista

b) Huge energy produced in the form of ATP and stored

Question 15.
How do conjoint vascular bundles fiffer from radial vascular bundels?
Answer:

• Conjoint vascular bundle : Xylem and Phloem are arranged in the same bundle on the same radius. Here phloem is located on the outer side of Xylem
• Radial vascular bundle : Xylem & Phloem are arranged in separate bundles on different radius.

Question 16.
Write any two peculiarities of facemose inflorescence.
Answer:

• Peduncle has unlimited growth.
• Flowers are arranged in Acropetal succession.

Question 17.
List any two functions of cell wall in plant cells.
Answer:

1. Give shape to the cell
2. Protects the cell from mechanical damage and infection.

Answer any 3 questions from 18 to 22. Each carries 3 scores. (3 × 3 = 9)

Question 18.
Given below are certain activities of growth regulators in plants. Arrange them under suitable heading in the table provided.
• Initiate rooting in stem cuttings.
• Bolting in rosette plants.
• Apical dominance.
• Increase length of grape stalks
• Pathenocarpy in tomatores.
• Speed up malting process in brewing industry
Auxin:
Gibberellin:
Answer:

1. Auxin : Initiate rooting in stem cuttings, Apical dominance, Parthenocarpy in tomatoes
2. Gibberellin : Bolting in rosette plants, Increase length of grape stalks, Speed up malting process in brewing industry

Question 19.
Write any three differences between cyclic and non- cyclic photophosphorylation.
Answer:

Cycic photophosphorvlation	Non-cvclic photophosphorvlation
1. Only PS I is functional,	1. Ps I and PS II are functional,
2. ATP is synthesized,	2. ATP & NADPH are synthesized.
3. Photolysis of water absent,	3. Photolysis of water present

Question 20.
Define Hydroponics. Write any two appli-cations of hydroponics.
Answer:
Hydroponics It is the soilless cultivation of plants in nutrient medium

1. It helps to study deficiency symptoms in plants
2. Commercial production of vegetables such as tomato, seedless cucumber & lettuce.

Question 21.
List out any three modifications of root with one example each.
(a) Identify and write the compounds A and B in the cycle.
(b) Name the scientist who first elucidated the cycle.
(c) Where does tricarboxylic cycle occur?
Answer:
Roots are modified for

1. Mechanical support
   • Prop roots : In banyan tree, adventitious roots are modified and provide mechanical support
   • Stilt roots : In maize and sugarcane adventitious roots are supporting and coming out from the lower nodes of the stem.
2. Storage of food
   • In carrot, turnips tap roots are modified for food storage
   • In sweet potato adventitious roots are swollen and store food.
3. Respiration
   • Rhizophora growing in swampy areas, many roots dome out of the ground and grow vertically upwards. Such roots are called

Question 22.
Given below is the schematic representation of tricarboxylic acid cycle in respiration.

Answer:
a) A cjtric acid B Succinic acid
b) Hans Kreb
c) Matrix of Mitochondria