AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is true of prokaryotic DNA?None, some or all may be correct.
A
It is linear
B
It is contained in a single chromosome
C
It is found in the nucleus
D
It is associated with histone proteins
Explanation: 

Detailed explanation-1: -The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.

Detailed explanation-2: -The single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes (pro = before; karyon– = nucleus). Animal cells, plant cells, fungi, and protists are eukaryotes (eu = true).

Detailed explanation-3: -Prokaryotic cells typically have a single, circular chromosome located in the nucleoid. Since prokaryotic cells typically have only a single, circular chromosome, they can replicate faster than eukaryotic cells.

Detailed explanation-4: -Prokaryotic cells do not have a true nucleus that contains their genetic material as eukaryotic cells do. Instead, prokaryotic cells have a nucleoid region, which is an irregularly-shaped region that contains the cell’s DNA and is not surrounded by a nuclear envelope.

There is 1 question to complete.