Friday, October 30, 2020

2020 March | HSE +1 Exam | Botany Question Paper

2020 March (+1) 
PART A: BOTANY 


Answer any 3 questions from 1 to 5. Each carries I score. (3 X 1 = 3)

1. Choose the correct answer. The organelle known as power house of the cell is:

a. Ribosome
b. Vacuole
c. Mitochondrion
d. Chloroplast

2. Choose the correct answer. 
    Casparian strips are present in:

a. Dicot root
b. Dicot stem
c. Dicot leaf
d. Monocot stem

3. Observe the figure given below. Name the organism.

4. Observe the relationship between the first two terms and fill in the blank.

Metaphase: Spindle fibres attach to kinetochores.
...................... : Chromatids move to opposite poles.

5. Fill in the blank.

The number of carbon atoms in acetyl co-enzyme A, which take part in Kreb's cycle is .......................

Answer any 9 questions from 6 to 16. Each carries 2 scores. (9 X 2 = 18)

6. Observe the figure given below:

a. Name the process.
b. Define the above identified process.

7. Analyse the table given below and fill in the blanks.

(A)

(B)

Zygotene

....... (a) ........

....... (b) ........

Crossing over

....... (c) ........

Dissolution of synaptonemal complex

Diakinesis

....... (d) ........


8. Define hydroponics. Write one advantage of it.

9. Peculiarities of certain cell organelles are given below:

a. Involved in protein synthesis.
b. Made up of many flat, disc shaped sacs or cisternae.
c. Bear ribosomes on their surface.
d. Rich in hydrolytic enzymes.
e. Membrane is absent.

    Copy the table given below and write the above peculiarities in appropriate column.

Lysosome

Golgi apparatus

Ribosome

 

 

 


10. Analyse the table given below and fill in the blanks a, b, c, d.

Processes

Cyclic photo- phosphorylation

Non-cyclic photophosphorylation

Movement of electrons

Cyclic

....... (a) ........

Number of photosystems

....... (b) ........

....... (c) ........

Splitting of water

....... (d) ........

Absent


11. The first step in respiration is glycolysis.

a. Define glycolysis.
b. Write the site of glycolysis.

12. Observe the given figure showing C4 pathway.


a. Identify the cells A and B.
b. Name the C4 acid formed through this pathway.
c. Name the enzyme involved in the formation of C4 acid.

13. Aerobic respiration and anaerobic respiration are two types of respiration.

a. What is anaerobic respiration?
b. Write the change that occurs to pyruvic acid in yeast cells.

14. Notice the three stages of Kelvin cycle given below:

Reduction, Regeneration, Carboxylation 

a. Arrange the above stages in correct order.
b. Kalvin cycle is also known as C3 cycle (Pathway). Give reason.

15. Match the items of column A with B.

(A)

(B)

a)     Double fertilisation

     i.      Bryophyte

b)     Heterospory

    ii.      Algae

c)     Protonema

   iii.      Gymnosperm

d)     Naked seeds

   iv.      Pteridophyte

 

    v.      Angiosperm


16. Cell theory was formulated by two scientists.

a. Name the scientists.
b. Write the two main points in cell theory.

Answer any 3 questions from 17 to 20. Each carries 3 scores. (3 X 3 = 9)

17. Observe the figures A and B. 


a. Identify the aestivation A and B.
b. Write one peculiarity of A.
c. Name the three kinds of petals in B.

18. The plant growth regulators are divided into growth promoters and growth inhibitors.

a. Name the three hormones, which are known as plant growth promoters.
b. Name the growth inhibitor which is known as ' stress hormone'.
c. Write any two roles of the above identified stress hormone.

19. Observe the figures A and B given below:


a. Name the type of venation in A and B.
b. Define venation.

20. Observe the figure given below:


Write any three features on mesophyll cells from the figure.

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