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DNA

Which of the ...

Question

Which of the following bases is not present in DNA?
(a) Adenine (b) Thymine (c) Cytosine (d) Uracil

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Solution

Answer: (d). Uracil

DNA contains the following four bases
(a) adenine (A) (b)thymine (T)
(c) guanine (G) (d) cytosine (C)

It does not contain uracil.

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Similar questions

Q. Which of these is not present in DNA?
(a) Adenine
(b) Thymine
(c) Uracil
(d) Cytosine

DNA and RNA contain four bases each. Which of the following bases is not present in RNA?
(a) Adenine (b) Uracil (c) Thymine (d) Cytosine

Q. Nitrogenous base present in DNA are
(a) Thymine
(b) Cytosine
(c) Adenine
(d) Guanine

Q. Assertion(A): Purine bases present in DNA are adenine and guanine.
Reason(R): The base uracil is present in DNA whereas the base thymine is present in RNA.

Q. Two stretches of DNA, A and B are taken for a polymerase chain reaction. If DNA-A has more guanine-cytosine bases than adenine-thymine and DNA-B has more adenine-thymine bases than guanine-cytosine bases, which of the following statements is true regarding PCR of these two stretches of DNA?

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