CBSE Class 12 Biology Question Paper 2005 (1)

CBSE Class 12 Biology Question Paper 2005 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.

SECTION-A

Q1. What would happen to the rate of photosynthesis in C3 plants if the CO2 concentration level almost doubles from its present level in the atmosphere?

Q2. In humans, starch digestion begins in the buccal cavity but stops in the Stomach. Why?

Q3. Name the two most biodiversity-rich zones of India.

Q4. Name the hormone that makes the plants more tolerant to various stresses.

Q5. Name the t major groups of cells required in attaining specific immunity.

SECTION - B

Q6. Name the end products of aerobic and anaerobic glycolysis List two ways by which molecules of ATP are produced in glycolysis during aerobic respiration in a cell.

Q7. Differentiate between Total Fertility Rate (TFR) and Replacement Level (RL).

Q8. Due to uncontrolled excessive hunting the population of tigers in a forest becomes Zero.

Discuss the long-term effects of this situation on the population of deer in that forest.

Q9. Name the source gland of luteinizing hormone (LH). Mention the other hormone along with which it acts on its target cells/organ. Give their two functions.

Q10. Can all the four chambers of the human heart experience systole simultaneously? Explain justifying your answer.

OR

What do you call the circulatory fluid in the body of cockroach? Mention its three functions.

Q11. Why d scientists pick hydrogen as the basis for MRI scanning? Name of the human body that do not appear in an MRI scan.

 Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2005 (1).