Question

dna is composed of four different ______________ which bind together in pairs.
chromosomes
histones
nitrogenous bases
cells

question 8
1 pts
the dna backbone is composed of a ____________ group and a pentose sugar.
glucose
peroxidase
phosphate
atomic

Explanation:

• For the first question: DNA is made up of four nitrogenous bases (adenine, thymine, cytosine, guanine) that pair (A - T, C - G). Chromosomes are structures containing DNA. Histones are proteins associated with DNA packaging. Cells are the basic units of life and contain DNA but are not the components that bind in pairs in DNA structure.
• For the second question: The DNA backbone is composed of a phosphate group and a pentose sugar (deoxyribose). Glucose is a hexose sugar. Peroxidase is an enzyme. Atomic is too general and not the specific group in the DNA backbone.

Answer:

• First question: nitrogenous bases
• Second question: phosphate