DNA

Question 1

where is DNA found?

Answer 1

nucleus, mitochondria, and chloroplast

Question 2

Structure of DNA and monomers/ polymer structure and bonds?

Answer 2

double helix long
monomer nucleotides with deoxyribose, phosphate, and nitrogenous base
sugar-phosphate bonds have strong while the nitrogenous base has weak hydrogen. A double T and C triple G
polymers: nucleic acid chain

Question 3

Classify the nitrogenous base pairs?

Answer 3

purines two ring ( a and G
pyramidines (single ring) U, T and C

Question 4

What are the functions of DNA?

Answer 4

contain heredity information
replicate so daughter cells have identical DNA
code for protein synthesis (growth)

Question 5

Coding vs Non coding DNA?

Answer 5

coding (2%) - exons
noncoding functional rna molecules

Question 6

Define DNA replication? and its importance

Answer 6

Dna replication is the process by which a new dna molecule is formed from an existing molecule which is identical to the original molecule.

Question 7

The process and when DNA replication occurs?

Answer 7

During interphase in the nucleus. Dna unwinds and weak H bonds between nitrogenous bases break by DNA helicase. the strands act as templates and free nucleotides from cytoplasm come to the nucleus and join corresponding bases by dna plymerase. two identical helicases form ( one new synthesized and one old) Dna daughter molecules winds back up around a histone to form chromosome

Question 8

Define DNA profiling and exception?

Answer 8

DNA profiling is the identifying and extraction of the black bars that represent fragments of a person’s DNA. exception is identical twins.

Question 9

Uses of DNA profiling?

Answer 9

forensics
paternity issues
identifying casualties
identify inherited disorders during pregnancy

Question 10

Views against DNA profiling?

Answer 10

violation of privacy
accuracy issues
manipulation