bio 121 module 4 Questions with Correct Answers

bio 121 module 4 Questions with Correct Answers


Question 1:
a mutation is a change in one nucleotide pair in a DNA molecule
Answer:
point



Question 2:
a point mutation is a change in nucleotide pair in a DNA molecule
Answer:
one



Question 3:
(t/f) point mutations can occur in exons and regulatory regions of genes
Answer:
true



Question 4:
a point mutation is when one new nucleotide pair is inserted
Answer:
addition



Question 5:
a point mutation is theremoval/elimination of one nucleotide from a gene
Answer:
deletion



Question 6:
a point mutation is when one nucleotide pair replaces another
Answer:
substitution

,Question 7:
(t/f) an example of a substitutionpoint mutation is when the TA in the wild-type allele is
converted to AT
Answer:
true



Question 8:
a point mutation is the
removal/elimination of one nucleotide from a gene
Answer:
deletion



Question 9:
(t/f) an example of a substitution
point mutation is when the TA in the wild-type allele is converted to AT
Answer:
true



Question 10:
(t/f) point mutations only have asmall impact and don't really cause mutations
Answer:
false



Question 11:
(t/f) point mutations only have a
small impact and don't really cause mutations
Answer:
false



Question 12:
(t/f) point mutations can have aprofound impact on genes because they can scramble all of the
three letter triplets
Answer:
true

, Question 13:
sickle cell anemia is caused by a point mutation in the beta-globin molecule
Answer:
substitution



Question 14:
(t/f) hemophilia, phenylketonuria, tay-sachs, color blindness, cystic fibrosis, and sickle cell
anemia are caused by point mutations
Answer:
true



Question 15:
hemophilia, phenylketonuria, tay-sachs, color blindness, cystic fibrosis, and sickle cell anemia
are caused by_ mutations
Answer:
point



Question 16:
(t/f) there can be many point mutations in one gene
Answer:
true



Question 17:
(t/f) point mutations can have a
profound impact on genes because they can scramble all of the three letter triplets
Answer:
true



Question 18:
WHICH STATEMENT ABOUT POINT MUTATIONS IS FALSE ?
AN ADDITION POINT MUTATION ADDS ONE NEW NUCLEOTIDE PAIR TO A DNA MOLECULE A
DELETION POINT MUTATION REMOVES ONE NUCLEOTIDE PAIR FROM A DNA MOLECULE A
SUBSTITUTION POINT MUTATION REPLACES ONE NUCLEOTIDE PAIR WITH ANOTHER SICKLE
CELL ANEMIA IS DUE TO A POINT MUTATION IN THE BETA-GLOBIN GENE