What is true of the secondary structure of DNA?

Which is true of the secondary structure of DNA? Nitrogenous bases are on the outside of the DNA molecule. Sugar-phosphate groups are on the inside of the DNA molecule. it consists of a single strand of DNA rather than two complementary strands.

What determines the secondary structure of a DNA molecule quizlet?

DNA attains a secondary structure when hydrogen bonds form between the nitrogenous bases called purines and pyrimidines. What functional groups define the two different ends of a DNA strand? one end has a free phosphate group on the 5′ carbon; the other end has a free hydroxyl group bonded to the 3′ carbon.

What is the secondary structure of RNA quizlet?

RNA bases form hydrogen bonds with complementary bases on the same strand forming hairpin loops. DNA forms hydrogen bonds with complimentary bases on a different strand. DNA’s second structure consists of two antiparallel strands twisted into a double helix.

How do secondary structures of DNA and RNA differ?

The secondary structures of biological DNA’s and RNA’s tend to be different: biological DNA mostly exists as fully base paired double helices, while biological RNA is single stranded and often forms complex and intricate base-pairing interactions due to its increased ability to form hydrogen bonds stemming from the …

What are correctly describes the structure of DNA?

DNA is a double-stranded molecule consisting of a long chain of nucleotides . A-form helix. RNA usually is a single-strand helix consisting of shorter chains of nucleotides.

Why is the secondary structure of DNA called a double helix?

Answered by. AlpenGlow. The structure of DNA is called a double helix because DNA is made up of two strands of nucleotides wound together in a spiral. DNA has two strands that run opposite of each other and twist together much like a twisted ladder. Each backbone of the ladder is made up of alternating groups of sugar and phosphate groups.

What is the general structure of the DNA structure?

General Genetics/Structure of the DNA Molecule. DNA is generally found as a double helix, composed of two chains, or strands, of nucleotides held together by hydrogen bonds.

Does DNA come in a specific shape or structure?

Although DNA looks like very thin long strings under a microscope, it turns out that DNA has a specific shape. This shape is called a double helix. On the outside of the double helix is the backbone which holds the DNA together.