contestada

The authors use the word "backbone" in lines 3
and 39 to indicate that
A) only very long chains of DNA can be taken from
an organism with a spinal column.
B) the main structure of a chain in a DNA molecule
is composed of repeating units.
C) a chain in a DNA molecule consists entirely of
phosphate groups or of sugars.
D) nitrogenous bases form the main structural unit
of DNA.

Respuesta :

cenonjeric3

Correct option is B, the main structure of a chain in a DNA molecule is composed of repeating units.

The passage's author provides a thorough explanation of DNA's structure. Nucleotides, which are made up of a sugar (deoxyribose), a phosphate group, and a nitrogenous base, make up each DNA strand. Each DNA strand is a polynucleotide made up of nucleotide-like building blocks.

A sugar molecule, a phosphate group, and a nitrogenous base make up a nucleotide. The phrase "backbone" is used in lines 3 and 39 to describe the exceedingly lengthy chain of sugar and phosphate groups that make up the molecule. As a result, choice B is the right answer.

Here's a question with an answer similar to this about DNA molecule:

https://brainly.com/question/12499113

#SPJ4

ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE

Otras preguntas