Multiple Choice QuestionsWhich extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Chorion
Allantois
Yolk sac
Amnion
A transgenic food crop, which may help in solving the problem of nightblindness in developing countries is
Flavr savr tomatoes
Starlink maize
Bt soyabean
Golden rice
D.
Golden rice
Vitamin-A deficiency causes night blindness among children. Vitamin-A deficiency often occurs, where rice is the staple food since rice grain does not contain B-carotene. Three tangents providing phytoene synthase, phytoene desaturase, B.carotene desaturase and lycopene cyclase activities were transferred into rice by Agrobacterium-mediated transformation. The resulting transgenic rice popularly called golden rice contains good quantities of Beta carotene.
Flavr savr is genetically modified tomato, which remains fresh and retains their flavour much longer than normal tomato due to blocking of synthesis of fruit softening enzyme polygalacturonase.
Which of the following bio-engineered bacteria is utilized for cleaning of marine oil slicks?
Escherichia coli
Pseudomonas syringae
Pseudomonas putida
Rhizoctonia solani
Cells obtained from cancerous tumours are known as
Hybridomas
Myelomas
Lymphocytes
Monoclonal cells
When pollen tube enters through micropyle, the process is called
Porogamy
Chalazogamy
Mesogarny
Apogamy
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