2 nucleic acids (keywords) Flashcards Preview

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Flashcards in 2 nucleic acids (keywords) Deck (18):
1

mononucleotide

complex chemicals made up of an organic base, a sugar and a phosphate. they are the basic units of which the nucleic acids DNA and RNA are made

2

dinucleotide

two mononucleotides joined by a phosphodiester bond between pentose sugar of one and the phosphate group of another in a condensation reaction

3

polynucleotide

continued linking of mononucleotides to form a long chain joined by phosphodiester bonds between pentose sugar of one and the phosphate group of another in condensation reactions

4

phosphodiester bond

the bond formed when a condensation reaction joins two mononucleotides together

5

DNA helicase

the enzyme that breaks the hydrogen bonds between base pairs in DNA replication causing the double helix to unwind and unzip and separate into two strands

6

DNA polymerase

...

7

replication fork

the point at which the 2 strands are separated

8

conservative model

original DNA molecule remained intact and a separate daughter DNA copy was built from new molecules of deoxyribose, phosphate and organic bases,
of the 2 molecules of DNA 1 made of original material, 1 made of new material

9

semi-conservative model

original DNA molecule unwinds and splits into 2 strands, each of which replicated its mirror image,
each of the two new molecules will have one strand new material and one strand original material

10

adenine

...

11

pentose sugar

a sugar that possesses 5 carbon atoms e.g. ribose & deoxyribose

12

phosphate

....

13

ATP

nucleotide found in all living organisms, which is produced during resp and imp in transfer of energy

14

ATP hydrolase

the enzyme that catalyses the hydrolysis of ATP to ADP and Pi

15

ATP synthase

the enzyme that catalyses the condensation of ADP and Pi to ATP during photosynthesis/resp

16

dipolar

having a pair of equal and opposite electrical charges

17

latent heat of vaporisation

heat taken in by a liquid in order to transform it into a vapour

18

cohesion

attraction between molecules of the same type (e.g. important in movement of water up plant)