AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the ratio of elements in nucleic acids?
A
1:2:few
B
1:1
C
1:2:1
D
none
Explanation: 

Detailed explanation-1: -Nucleotides, as they appear in RNA, contain on average 36.2% C, 16% N, and 9.6% P; the elemental composition of nucleotides in DNA is very similar. Thus, nucleotides in nucleic acids have N levels that are similar to those found in protein (16% vs. 17%), which are in turn much higher than levels in most organisms.

Detailed explanation-2: -The basic elements that compose DNA are five atoms: carbon, nitrogen, oxygen, phosphorous, and hydrogen. A nucleoside is the combination of these atoms into two structures, a five-carbon sugar molecule called deoxyribose, which is responsible for the name of DNA, and a phosphate group.

Detailed explanation-3: -if it contains carbon, hydrogen and oxygen only in the ratio of 1:2:1, then it is a carbohydrate. If it contains carbon, hydrogen, oxygen and nitrogen, then it might be a protein.

Detailed explanation-4: -During transcription, the RNA polymerase read the template DNA strand in the 3′

There is 1 question to complete.