Kerala Plus One Botany Question Paper March 2019 with Answers

Teachers recommend solving Kerala Syllabus Plus One Botany Previous Year Question Papers and Answers Pdf March 2019 to improve time management during exams.

Kerala Plus One Botany Previous Year Question Paper March 2019

Answer all questions from question numbers 1 to 3. Each carry 1 score. (3 × 1 = 3)

Question 1.
Choose the Correct answer.
A structure seen in bacterial cell is _______
a) Nucleus
b) Lysosome
c) Plastid
d) Mesosome
Answer:
d) Mesosome

Question 2.
Observe the relationship between the first two terms and fill in the blank.
a) Mushroom : Agaricus
b) Bread mould :
Answer:
b) Rhizopus

Question 3.
Fill in the blank:
Cytokinesis in animal cell takes place by the ap-pearance of a in the plasma membrane.
Answer:
Cleavage furrow

Answer any nine questions from 4 to 14. Each carries two score. (9 × 2 = 18)

Question 4.
Observe the figure given below.

Identify the process demonstrated in the figure. Write the role of membrane in this process.
Answer:
Osmosis,
Active transport and passive transport occurs

Question 5.
Certain thylakoid pigments are called accessory pigments. Name them, Write their significance.
Answer:

1. Chlorophyll b, xanthophylls and carotene
2. Protect chlorophyll a molecule from photo-oxidation.

Question 6.
Notice the three simple tissues given below.
a) Sclerenchyma
b) Parenchyma
c) Collenchyma
Identify and write the tissue that consists of cells that are thickened at the corners. Write the function of this tissue.
Answer:
c) Collenchymas
• It provides mechanical support

Question 7.
Write any two differences between aerobic respira-tion and anaerobic respiration.
Answer:

1. Aerobic respiration takesplace in cytoplasm and mitochondria with the help of oxygen
2. Anaerobic respiration takesplace in cytoplasm without the use of oxygen

Question 8.
Observe the figure given below. It shows two phases in the life cycle of a plant.

Identify the phase marked as A. Write any two peculiarities of this state.
Answer:

1. A-sporophytic generation
2. It is diploid stage.it produces spores

Question 9.
Karyokinesis of mitosis is divided into fourstages. Name the second and third stage. Write any two features of second stage.
Answer:

1. 2nd metaphase, 3rd anaphase
2. Chromosomes are arranged at equator
3. Spindle fibres are attached to kinetochore of chromosomes

Question 10.
Observe the figure given below.

Identify the parts a, b. Write their functions.
Answer:
a) Grana
b) Stroma
• In grana light reaction takesplace and energy rich molecules are produced
• In sroma dark reaction takesplace and energy rich molecules are utilized

Question 11.
C₄ plants have a special leaf anatomy. Name that antomy. Write three peculiarities of this kind of anatomy.
Answer:

1. Kranz anatomy
2. Two types of chloroplast present
3. Bundle sheath chloroplast is large and agranal

Question 12.
Observe the figure given below.

Name the complex. Write its functions, go
Answer:

1. ATP synthase complex
2. It act as proton channel and oxidative phosphorylation takesplace.

Question 13.
Observe the elements given below.
Copper, Phosphorus, Boron, Magnesium, Potassium, Manganese, Chlorien Choose microelements from the above.
Answer:
Copper, boron, manganese and chlorine

Question 14.
Match the items of column A with B

A	B
a) Reduction	i) Formation of oxygen
b) Photolysis	ii) Formation of 3-PGA
c) Photorespiration	iii) Formation of PEP
d) Carboxylation	iv) Formation of glucose
	v) Formation of phosphoglycolate

Answer:

A	B
a) Reduction	formatipn of glucose
b) Photolysis	formation of oxygen
c) Photorespiration	formation of phosphoglycolate
d) Carboxylation	formation of 3PGA

Answer any three questions from 15 to 18. Each carries three score. (3 × 3 = 9)

Question 15.
Write thee peculiarities of gynoecium seen in solanaceae and fabaceae.
Answer:

1. Solanaceae – bicarpellary, syncarpous and superior ovary with axile placentation
2. Fabaceae – monocarpellary, superior or half inferior ovary with marginal placentation

Question 16.
Plantgrowth regulators perform various functions in piant body.
a) Name the hormones responsible for apical dominance and bolting. Define the two phenomena.
b) Which plant hormone is referred to as an antagonist to gibberellic acid?
Answer:

1. Apical dominance-auxin Bolting-gibberellins
2. Apical dominance-Growth of apical bud inhibit the growth of lateral bud
3. Bolting-internodal elongation just prior to flowering

Question 17.
Name of three plants are given below.
a) Rhizophora eeognragnnoo
b) Bougainvillea aaiMaracnlnflgj
c) Pea oKoxd a.ajs1
Name the modifications seen in these plants. Write theirfunctions.
Answer:
a) Rhizophora-pneumatophore
• It helps in respiration

b) Bougainvillea-thorn
• It acts as defense structure

c) Pea-leaf tendril
• It helps in climbing

Question 18.
Observe the terms given below.
Xylem, Root hairs, Pith, Stomata, Cambium, Bulliform cells. From this, identify and write the structures seen in epidermal tissue system. Write their functions. (Hint: 3 structures)
Answer:

1. Root hair : absorption of water and minerals
2. Stomata : helps in gaseous exchange
3. Bulliform cells : it helps in rolling and unrolling of lamina.This help to reduce transpiration rate.