Your classmate complains of cough and headache to the doctor. The doctor confirms that he is suffering from pneumonia and not just common cold.
(a) How did the doctor arrive at this conclusion?
(b) Write the binomials of the causative organisms of pneumonia.
(c) What is common about the transmission of the two diseases, common cold and pneumonia?

Study the diagram showing the entry of HIV into the human body and the processes that are followed:

(a) Name the human cell 'A' HIV enters into.
(b) Mention the genetic material 'B' HIV releases into the cell.
(c) Identify enzyme 'C'

The skeletal structure of a cannabinoid molecule is given above. Answer the following questions.
(a) What are the modes of its consumption by humans?
(b) Name the four different forms in which cannabinoids are produced.

Read the following and answer any four questions from (i) to (v) given below :
X and Yare communicable diseases whereas Wand Z are non-communicable diseases. X is transmitted through vectors whereas Y is transmitted through droplet infection. W is caused due to a hormone deficiency whereas Z is a degenerative disease.
Based on the above information, answer the following questions.
(i) Identify W, X, Y and Z.

(ii) Select the correct statement.

(iii) If X and Y both are usual diseases then which of the following holds true?

 (iv) If X and Y both are bacterial diseases then select the correct match from the following.

(v) Assertion: Communicable diseases could be contagious or non-contagious.
Reason: Diseases that spread through vectors are non-contagious disease.

Read the following and answer any four questions from (i) to (v) given below:
Priya was 4 years old when she contracted chicken pox. It took her around 15 days to recover completely. Now Priya is 5 years old so her mother got her vaccinated few days back for DPT (5th dose) as per immunisation program. Recently she was playing with her friend in the park when her friend accidently fell on iron pipe and badly bruised her knee. She was taken to the hospital where doctor gave her ATS injection and painkillers. Based on the above information, answer the following questions.
(i) Select the correct statement.

(ii) Which of the following do you think is an example of natural passive immunity?

(iii) Which of the following is true for active immunity?

(iv) Select the incorrect match.

(v) Assertion: A person recovered from measles develops an active immunity against this infection.
Reason: In active immunity, person's own cells develop antibodies in response to infection.