PORTAGE LEARNING BIO 171 FINAL EXAM
PREP QUESTIONS AND ANSWERS FULL
SOLUTION GRADED A+
⩥ What is the basic unit of life?
Answer: The cell
⩥ Why can different cell types have different functions despite having
the same DNA?
Answer: Differential gene expression
⩥ What is the Central Dogma?
Answer: DNA → RNA → Protein
⩥ What is genotype?
Answer: Genetic makeup
⩥ What is phenotype?
Answer: Observable traits
⩥ What determines protein function?
Answer: Protein structure
,⩥ What disease example shows structure determines function?
Answer: Sickle cell disease
⩥ What is natural selection?
Answer: Differential survival/reproduction based on inherited traits
⩥ Does evolution act on need or existing variation?
Answer: Existing variation
⩥ What is heterozygote advantage?
Answer: A heterozygote has greater fitness than either homozygote
⩥ What causes different beak shapes in Galapagos finches?
Answer: Natural selection acting on variation
⩥ What are the three essential functions of DNA?
Answer: Replication, information storage, mutation
⩥ Who used X-ray diffraction to help determine DNA structure?
Answer: Rosalind Franklin
, ⩥ Who proposed the double helix model?
Answer: Watson and Crick
⩥ What bases pair together in DNA?
Answer: A-T and G-C
⩥ How many hydrogen bonds form between A and T?
Answer: 2
⩥ How many hydrogen bonds form between G and C?
Answer: 3
⩥ What allows accurate DNA replication?
Answer: Complementary base pairing
⩥ What stores biological information in DNA?
Answer: The order of nucleotides
⩥ What is transcription?
Answer: DNA → RNA
⩥ What is translation?
PREP QUESTIONS AND ANSWERS FULL
SOLUTION GRADED A+
⩥ What is the basic unit of life?
Answer: The cell
⩥ Why can different cell types have different functions despite having
the same DNA?
Answer: Differential gene expression
⩥ What is the Central Dogma?
Answer: DNA → RNA → Protein
⩥ What is genotype?
Answer: Genetic makeup
⩥ What is phenotype?
Answer: Observable traits
⩥ What determines protein function?
Answer: Protein structure
,⩥ What disease example shows structure determines function?
Answer: Sickle cell disease
⩥ What is natural selection?
Answer: Differential survival/reproduction based on inherited traits
⩥ Does evolution act on need or existing variation?
Answer: Existing variation
⩥ What is heterozygote advantage?
Answer: A heterozygote has greater fitness than either homozygote
⩥ What causes different beak shapes in Galapagos finches?
Answer: Natural selection acting on variation
⩥ What are the three essential functions of DNA?
Answer: Replication, information storage, mutation
⩥ Who used X-ray diffraction to help determine DNA structure?
Answer: Rosalind Franklin
, ⩥ Who proposed the double helix model?
Answer: Watson and Crick
⩥ What bases pair together in DNA?
Answer: A-T and G-C
⩥ How many hydrogen bonds form between A and T?
Answer: 2
⩥ How many hydrogen bonds form between G and C?
Answer: 3
⩥ What allows accurate DNA replication?
Answer: Complementary base pairing
⩥ What stores biological information in DNA?
Answer: The order of nucleotides
⩥ What is transcription?
Answer: DNA → RNA
⩥ What is translation?
