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Chapter 14: Q. 4 (page 367)

If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C? a. 27 percent b. 30 percent c. 23 percent d. 54 percent

Short Answer

Expert verified

Option c is correct.

Step by step solution

01

Step 1. Introduction

There are two types of nitrogenous bases in a nucleic acid that is pyrimidines and purines. Adenine is complementary to thymine and Guanine is complementary to cytosine.

02

Step 2. Explanation of the correct option.

Adenosine (A) is complimentary with Thymine (T), which means that there is 27% of A + 27 % of T = 54%

To get the percentage of Cytosine (C) we need to understand that Cytosine and Guanine (G) are also complementary pairs of each other. That indicates that the remaining 46% is half C and half G.

Therefore the percentage of Cytosine will be 23%.

03

Step 3. Explanation of the incorrect options

Option a is incorrect because the percentage of Cytosine will be 23%.

Option b is incorrect because the percentage of Cytosine will be 23%.

Option d is incorrect because the percentage of Cytosine will be 23%.

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Most popular questions from this chapter

DNA double helix does not have which of the following? a. antiparallel configuration b. complementary base pairing c. major and minor grooves d. uracil

Why were radioactive sulfur and phosphorous used to label bacteriophage in Hershey and Chase's experiments?

The ends of the linear chromosomes are maintained by a. helicase b. primase c. DNA pol d. telomerase

Which of the following components is not involved during the formation of the replication fork?

a. single-strand binding proteins

b. helicase

c. origin of replication

d. ligase

A scientist creates fruit fly larvae with a mutation that eliminates the exonuclease function of DNA pol III. Which prediction about the mutational load in the adult fruit flies is most likely to be correct? a. The adults with the DNA pol III mutation will have significantly more mutations than average. b. The adults with the DNA pol III mutation will have slightly more mutations than average. c. The adults with the DNA pol III mutation will have the same number of mutations as average. d. The adults with the DNA pol III mutation will have fewer mutations than average.
See all solutions

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