Chargaff's Rule

Q. Which of the following is NOT true with regard to Chargaff’s rules?

1. A:T = 1:1
2. G:C = 1:1
3. A+T : G+C = 1:1
4. A+G : T+C = 1:1

Q. In DNA of certain organisms, guanine constitutes $20\%$ of the bases. What percentage of the bases would be adenine?

1. $10\%$
2. $20\%$
3. $30\%$
4. $40\%$

Q. The alternation of gametophytic generation from a sporophytic generation occurs as a result of

1. oogamy
2. mitosis
3. meiosis
4. isogamy

Q. State whether true or false:
The ratio A+T/G+C remains constant for a particular species.

1. True
2. False

Q. In a DNA, the percentage of thymine is 20 %, then what is the percentage of guanine?

1. $20\%$
2. $40\%$
3. $30\%$
4. $60\%$

Q. The amount of cytosine is equal to amount of thymine and similarly, the total amount of adenine is equal to the total amount of guanine.

1. False
2. True

Q. In sea urchin DNA, which is double-stranded, $17\%$ of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are:

1. G - 8.5 %, A - 50 %, T - 24.5 %
2. G - 34 %, A - 24.5 %, T - 24.5 %
3. G - 17 %, A - 16.5 %, T - 32.5 %
4. G - 17 %, A - 33 %, T - 33 %

Q. The complementary DNA strand for ATGGCTTGCAATGCT is

1. TACCGAACGTTACGC
2. TACCGAACGATACGA
3. TACCGAACGTTACGA
4. TACCGACCGTTACGA

Q. Which one of the following is wrongly matched?

1. Uniflagellate gametes - Polysiphonia
2. Gemma cups - Marchantia
3. Unicellular organism - Chlorella
4. Biflagellate zoospores - Brown algae

Q. Which of the following undergoes meiosis in algae?

1. Aplanospore
2. Zygote
3. Zoospore
4. Algae never undergo meiosis as they are haploid