TEST 2: DNA: The Molecule of Heredity Flashcards
Why is DNA considered the blueprint of life?
it contains the complete set of genetic instructions needed for an organism to develop, function, grow, and reproduce
Two types of nucleic acids
Deoxyribonucleic acid DNA and ribbon nucleic acid RNA
How is DNA built/structured
Composed of nucleotides(AT CG pairings) and a sugar(deoxyribose) and phosphate backbone
How is RNA built/structured
Composed of nucleotides(AU CG pairings) and a sugar(Ribose) and phosphate backbone
Components, that are the same for all nucleotides
Phosphate group(links, the sugar of one nucleotide sugar of next nucleotide, sugar group(deoxyribose or ribose), nitrogenous base (AG CT AND U)
Components that differ between DNA nucleotides
Each nitrogenous base is different from the next, a pairs with t, deoxyribonucleic acid, two stranded double helix
Components that differ between RNA nucleotides
Nitrogenous bases, ribonucleic acid, a pairs with U, one strand
Structure of DNA
A DNA molecule consists of two strands, hydrogen bonds hold complementary base pairs(AT GC) together in a DNA molecule
How are DNA strands held together
Hydrogen bonds, base pair rules, and hydrophobic interactions
Define DNA strand
Single chain of nucleotides
Define DNA molecule
A DNA molecule consists of two DNA strands that are complementary and joined by hydrogen bonds for me. A double helix structure.
What does sugar phosphate group do?
The sugar phosphate backbone is a structural framework for DNA or RNA
Provide structural stability and maintains direction of strand
For a given DNA molecule , What is the relationship between the amount of each of the DNA nucleotides?
%a=%t and %g=%c
