In the spiral staircase model of DNA, the rungs

are
a. deoxyribose sugars.
b. hydrogen bonds.
c. nucleotide base pairs.
d. phosphate groups.
e. composed of all of these


C

Biology & Microbiology

You might also like to view...

Which of these plant tissue types is composed of cells with primary walls thickened at the corners that provide support for immature parts of the cell body?

A. collenchyma B. phloem C. sclerenchyma D. xylem E. parenchyma

Biology & Microbiology

Which bacterial genera contain members that are very similar physiologically to Pseudomonas and cause a similar spectrum of opportunistic infections?

What will be an ideal response?

Biology & Microbiology

Lizards and snakes are living representatives of which lineage?

a. lepidosaurs b. anapsids c. archosaurs d. synapsids

Biology & Microbiology

Organisms that can grow with or without oxygen present are

A) obligate aerobes. B) facultative anaerobes. C) aerotolerant anaerobes. D) obligate anaerobes. E) either facultative anaerobes or aerotolerant anaerobes.

Biology & Microbiology