This question paper has two sections as A and B each of 20 marks
Section A is compulsory.
Section A (20 marks)
Question 1. Multiple choice questions 5 marks
a. Germic cells divide by
(i) Mitosis
(ii) Meiosis
(iii) Both of these
(iv) None of these
b. In meiosis, chromosomes number is reduced by
(i) 1/4
(ii) 3/4
(iii) 1/3
(iv) 1/2
c. Chromosomes get aligned at the centre of the cell during
(i) Anaphase
(ii) Metaphase
(iii) Prophase
(iv) Telophase
d. The cell component visible only the cell division is
(i) Mitochondria
(ii) Chloroplasts
(iii) Chromosomes
(iv) Chromatin
e. DNA replication takes place in
(i) G 1 phase
(ii) S phase
(iii) G 2 phase
(iv) M phase
Question 2. Fill in the blanks 10 marks
a. ............is made up of lipoprotein.
b. Cell wall is made up........ and is present in.......cells.
c. .......... allows exchange of substances between nucleus and cytoplasm.
d. Cell was discovered by..............
e. ........... discovered nucleus.
f. ........... is known as power house of cell.
g. Cell wall is made up of.....
h. ......... are the site of protein synthesis
i. Chloroplasts imparts.......colour to the leaf.
j. ........saw living cells for the first time.
Question 3. Match the following questions 5 marks
Column A Column B
Cell organelles Functions
a. Rough ER (i) synthesise protein
b. Smooth ER (ii) makes ATP
c. Golgi complex (iii) digests germs and macromolecules in the cells
d. Lysosome (iv) moves materials out of the cells
e. Mitochondria (v) synthesise lipids
Section B (20 marks)
Question 4. Answer the following questions
a. Define palaeobiology.
b. What are fossil fuels?
c. Define fertilisation.
d. Explain pollination and its types.
e. Draw striated muscles and label it.
f. Explain different types of pollinating agents.
g. Draw a neat and labelled diagram of mitochondria.
h. Write the names of reproductive whorls of a flower.
i. Define fruit and write its types.
j. Write a short note on discovery of the cell.
