Advanced Placement (AP) Biology Practice Exam

Question: 1 / 490

What characterizes the chromosomal makeup of prokaryotic cells?

A single circular chromosome

Prokaryotic cells are characterized by having a single circular chromosome. This structure is quite distinct from that of eukaryotic cells, which typically contain multiple linear chromosomes housed within a nucleus. The circular chromosome in prokaryotes is not associated with histones in the same way eukaryotic DNA is packaged into chromatin. Instead, the circular DNA is compacted and held in a region of the cell called the nucleoid, which is not membrane-bound.

This single circular chromosome allows prokaryotic cells to efficiently replicate their DNA and carry out essential genetic functions within their simpler cellular structure. The other options do not accurately represent prokaryotic chromosomal makeup, as prokaryotes do not possess multiple linear chromosomes, channeled chromatin structure like in eukaryotes, or exclusively promoter regions.

Get further explanation with Examzify DeepDiveBeta

Multiple linear chromosomes

Chromatin structure only

Promoter regions of genes only

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy