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:
2. Choose the correct answer.
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:
7. Analyse the table given below and fill in the blanks.
8. Define hydroponics. Write one advantage of it.
9. Peculiarities of certain cell organelles are given below:
Copy the table given below and write the above peculiarities in appropriate column.
10. Analyse the table given below and fill in the blanks a, b, c, d.
11. The first step in respiration is glycolysis.
12. Observe the given figure showing C4 pathway.
13. Aerobic respiration and anaerobic respiration are two types of respiration.
14. Notice the three stages of Kelvin cycle given below:
15. Match the items of column A with B.
16. Cell theory was formulated by two scientists.
Answer any 3 questions from 17 to 20. Each carries 3 scores. (3 X 3 = 9)
17. Observe the figures A and B.
18. The plant growth regulators are divided into growth promoters and growth inhibitors.
19. Observe the figures A and B given below:
20. Observe the figure given below:
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:
3. Observe the figure given below. Name the organism.
4. Observe the relationship between the first two terms and fill in the blank.
a. Dicot root
b. Dicot stem
c. Dicot leaf
d. Monocot stem
3. Observe the figure given below. Name the organism.
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.