Q. Over past 1.5 billion years how many times a supercontinent has been formed?

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Q. Which of following is most likely to be genetic material?

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Q. How many million years ago did late cynodonts exist?

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Q. Layered rocks formed when prokaryotes bind thin films of sediments together is called

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Q. Which of the following is released when a Hydrogen atom loses an electron?

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Q. Which of the following is an example of amphoteric molecule?

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Q. Acids that lose a proton easily are weak acids.

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Q. What is the full form of pH?

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Q. A solution having a pH of 6 has a proton concentration of _______

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Q. What is the concentration of pure water?

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Q. In presence of an acid, amino group can be ____________

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Q. Buffers react with _______________ ions.

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Q. Buffers usually contain ________________ with its conjugate ____________

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Q. Carbonic acid and bicarbonate ions buffer which of the following?

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Q. Heptoses are __________

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Q. Fructose is a _____________

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Q. The compounds which have same chemical reactivity but structures which are mirror images of each other are known as ____________

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Q. Which of the following conventions is used to denote the presence of carbonyl group in left/right in the chemical structure of a carbohydrate?

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Q. Enzymes in a cell can distinguish between L and D forms of sugar.

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Q. Which types of bonds are found in sugars?

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