Study a part of the life cycle of malarial parasite given below. Answer the questions that follow:
(a) Mention the roles of A in the life cycle of the malarial parasite.
(b) Name the event C and the organ where this event occurs.
(c) Identify the organ B and name the cells being released from it.(a) A in the image represents the female mosquito. The female mosquito takes up the gametocytes of the malarial parasite along with the blood meal when it bites an infected person.
(b) The event 'C' is the fertilization stage and it takes place in the intestine of the mosquito.
(c) The organ 'B' is the salivary gland of the mosquito and the sporozoites escape out of the mosquito's salivary gland.
Name the two different categories of microbes naturally occurring in sewage water. Explain their role in cleaning sewage water into usable water.
Draw a schematic sketch of pBR 322 plasmid and label the following in it:
(a) Any two restriction sites.
(b) Ori and rop genes.
(c) An antibiotic resistant gene.
Given below is the representation of amino acid composition not the relevant translated portion of β-chain of hemoglobin, related to the shape of human red blood cells. 
(a) Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.
(b) What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?
(c) Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?(a) Name the enzyme responsible for the transcription of tRNA and the amino acid the initiator tRNA gets linked with.
(b) Explain the role of initiator tRNA in initiation of protein synthesis.
Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.
By the end of 2002 the public transport of Delhi switched over to a new fuel. Name the fuel. Why is this fuel considered better? Explain.
Write the function of each one of the following:
(a) (Oviducal) Fimbriae
(b) Coleoptile
(c) Oxytocin
