Total Marks: 65 | Time: 2 Hours
Section A – Multiple Choice Questions (12 Marks)
(Attempt all questions)
1. The branch of biology that deals with heredity and variations is called:
a) Ecology
b) Genetics
c) Microbiology
d) Taxonomy
2. Binomial nomenclature was introduced by:
a) Aristotle
b) Linnaeus
c) Darwin
d) Mendel
3. The organelle responsible for protein synthesis is:
a) Mitochondria
b) Ribosome
c) Nucleus
d) Golgi apparatus
4. The phase in which chromosomes are pulled apart during mitosis is:
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
5. The plant tissue responsible for transporting water is:
a) Phloem
b) Xylem
c) Parenchyma
d) Collenchyma
6. The monomers of carbohydrates are:
a) Amino acids
b) Fatty acids
c) Monosaccharides
d) Nucleotides
7. The site of photosynthesis in plant cells is:
a) Mitochondria
b) Chloroplast
c) Ribosome
d) Nucleus
8. Which process helps plants absorb water from the soil?
a) Diffusion
b) Active transport
c) Osmosis
d) Transpiration
9. The male reproductive organ in plants is called:
a) Carpel
b) Ovary
c) Stigma
d) Stamen
10. The theory of evolution is based on the concept of:
a) Artificial selection
b) Natural selection
c) Genetic engineering
d) Homeostasis
11. Fossils are preserved remains of:
a) Living organisms
b) Rocks
c) Minerals
d) Water
12. The process of food transport in plants is called:
a) Translocation
b) Transpiration
c) Photosynthesis
d) Osmosis
Section B – Short Answer Questions (33 Marks)
(Attempt any 11 questions. All questions carry equal marks.)
1. Define the scope and importance of biology.
2. Differentiate between autotrophs and heterotrophs.
3. Describe the major differences between plant and animal cells.
4. What is cytokinesis? How does it differ in plant and animal cells?
5. Describe the structure of epithelial tissue and its types.
6. What are the components of a nucleotide?
7. How do enzymes work as biological catalysts?
8. Explain the role of mitochondria in cellular respiration.
9. What are the limiting factors of photosynthesis?
10. How does transpiration benefit a plant?
11. What is double fertilization in plants?
12. Differentiate between wind and insect pollination.
13. How does natural selection lead to evolution?
14. What is the significance of genetic variation?
15. Explain the process of fossil formation.
Section C – Long Answer Questions (20 Marks)
(Attempt any 2 questions. All questions carry equal marks.)
Q1.
a) Describe the characteristics of living organisms.
b) Explain the classification of living organisms.
c) Why is biodiversity important?
Q2.
a) What are the stages of mitosis?
b) How does meiosis contribute to genetic diversity?
c) Compare and contrast mitosis and meiosis.
Q3.
a) What is the role of chlorophyll in photosynthesis?
b) Explain the importance of light in photosynthesis.
c) How do plants store the energy produced during photosynthesis?