What structural features are found in single stranded DNA?
_____ Which structural feature is found in the single-stranded DNA molecule? a) It can have a negatively-charged backbone composed of nitrogenous bases. b) Each 3′,5′-phosphodiester bond will contain one phosphate group linking two deoxyribose sugars.
What is DNA Bioninja?
• DNA is a double helix molecule made of two antiparallel strands of nucleotides linked by hydrogen bonding. between complementary base pairs. Nucleic acids are composed of nucleotide monomers which are linked into a single strand via condensation reactions.
What is an antiparallel DNA strand?
Antiparallel: A term applied to two molecules that are side by side but run in opposite directions. The two strands of DNA are antiparallel. The head of one strand is always laid against the tail of the other strand of DNA.
What are the 3 main structures of DNA?
The Building Blocks of DNA DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
What does ss DNA mean?
Single stranded dna
Definition. A DNA molecule consisting of only a single strand contrary to the typical two strands of nucleotides in helical form. Supplement.
Why does DNA pol I carry the number one?
Why does DNA pol I carry the number one? It contains a form of DNA pol III that can add new nucleotides to either the 5′ end or the 3′ end of an existing strand. All other properties of the enzyme remain unchanged.
What is the function of DNA Primase?
Primase functions by synthesizing short RNA sequences that are complementary to a single-stranded piece of DNA, which serves as its template. It is critical that primers are synthesized by primase before DNA replication can occur.
Why are 2 strands of DNA antiparallel?
The sugar and phosphate make up the backbone, while the nitrogen bases are found in the center and hold the two strands together. Due to the base pairing, the DNA strands are complementary to each other, run in opposite directions, and are called antiparallel strands.
Why must DNA be antiparallel?
DNA replication The nucleic acid sequences are complementary and parallel, but they go in opposite directions, hence the antiparallel designation. The antiparallel structure of DNA is important in DNA replication because it replicates the leading strand one way and the lagging strand the other way.
How much DNA is in a cell?
A human cell contains about 6 pg of DNA.