Lab test 1 PTC PCR Exam Q & As
(Verified Answers) 2026
5 basic tastes - CORRECT ANSWERS sweet, sour, bitter, salty, umami
taste perception steps - CORRECT ANSWERS a taste molecule binds to a specific receptor
on the surface of a taste cell
the taste cell generates a nervous impulse, which is interpreted by the brain
stimulation of sweet cells generates a perception of _____ - CORRECT ANSWERS
sweetness in the brain
DuPont observation in the 1930s - CORRECT ANSWERS Arthur Fox and CR Noller
Noller tasted the bitter PTC dust
studies done by _____ _______ showed that the inability to taste PTC is a _____ trait that varies in
human population - CORRECT ANSWERS albert blackeslee
recessive
there are ______ genes for different bitter taste receptors in mammals - CORRECT ANSWERS
30
the gene for the PTC taste receptor - CORRECT ANSWERS TAS2R38
TAS2R38 - CORRECT ANSWERS 3 nucleotides that vary
, each variable is termed a SNP (single nucleotide polymorphism)
a haplotype correlated most
haplotype - CORRECT ANSWERS a combination of 3 SNP's
in the first two lab sessions, a sample of human cells is obtained by... - CORRECT ANSWERS
saline mouthwash
section 1 step 1
DNA is extracted by boiling with _____ which _________________ - CORRECT ANSWERS
Chelex resin
binds contaminating metal ions
section 1 step 2
________ is used to amplify a short region of the TAs2R38 gene - CORRECT ANSWERS PCR
section 1 step 3
the amplified PCR product is digested with the restriction enzyme HaeIII, whose recognition sequence
includes one of the SNPs. One allele is cut by the enzyme, and one is not--producing a restrictin
fragment length polymorphism (RFLP) that can be separated on a 2% agarose gel. Each student scores
his or her genotype, predicts their tasting abilty, and then tastes PTC paper - CORRECT ANSWERS
second session
1 microliter - CORRECT ANSWERS 1 millionth of a Liter is uL
Micropipettors sizes
P20
(Verified Answers) 2026
5 basic tastes - CORRECT ANSWERS sweet, sour, bitter, salty, umami
taste perception steps - CORRECT ANSWERS a taste molecule binds to a specific receptor
on the surface of a taste cell
the taste cell generates a nervous impulse, which is interpreted by the brain
stimulation of sweet cells generates a perception of _____ - CORRECT ANSWERS
sweetness in the brain
DuPont observation in the 1930s - CORRECT ANSWERS Arthur Fox and CR Noller
Noller tasted the bitter PTC dust
studies done by _____ _______ showed that the inability to taste PTC is a _____ trait that varies in
human population - CORRECT ANSWERS albert blackeslee
recessive
there are ______ genes for different bitter taste receptors in mammals - CORRECT ANSWERS
30
the gene for the PTC taste receptor - CORRECT ANSWERS TAS2R38
TAS2R38 - CORRECT ANSWERS 3 nucleotides that vary
, each variable is termed a SNP (single nucleotide polymorphism)
a haplotype correlated most
haplotype - CORRECT ANSWERS a combination of 3 SNP's
in the first two lab sessions, a sample of human cells is obtained by... - CORRECT ANSWERS
saline mouthwash
section 1 step 1
DNA is extracted by boiling with _____ which _________________ - CORRECT ANSWERS
Chelex resin
binds contaminating metal ions
section 1 step 2
________ is used to amplify a short region of the TAs2R38 gene - CORRECT ANSWERS PCR
section 1 step 3
the amplified PCR product is digested with the restriction enzyme HaeIII, whose recognition sequence
includes one of the SNPs. One allele is cut by the enzyme, and one is not--producing a restrictin
fragment length polymorphism (RFLP) that can be separated on a 2% agarose gel. Each student scores
his or her genotype, predicts their tasting abilty, and then tastes PTC paper - CORRECT ANSWERS
second session
1 microliter - CORRECT ANSWERS 1 millionth of a Liter is uL
Micropipettors sizes
P20
