Bio 167 Exam 1 UPDATED Exam
Questions and CORRECT Answers
What are genes? - CORRECT ANSWER - DNA carries the code to make proteins within
cells.
Approx how many cells are located in your body? - CORRECT ANSWER - 100 trillion
What are chromosomes composed of? - CORRECT ANSWER - coiled DNA
5 types of atoms that make up DNA: - CORRECT ANSWER - hydrogen, oxygen,
nitrogen, carbon, phosphorus
Cells entrust the instructions for their construction and operation to_______. - CORRECT
ANSWER - DNA
What is meant by the phrase that DNA is a polymer? - CORRECT ANSWER - DNA is a
polymer means that it is a long molecule made up of small units linked together.
What type of bond holds the complementary bases together on the two strands of the double
helix? - CORRECT ANSWER - hydrogen bond
What is the function of the CCR5 gene, with respect to the HIV virus? - CORRECT
ANSWER - HIV uses the CCR5 protein as a landing pad prior to invading the cell.
Distinguish between prokaryotic and eukaryotic cells. - CORRECT ANSWER -
prokaryotic = no nucleus, bacteria
eukaryotic = nucleus, human
, What is the nucleus? What is its function? - CORRECT ANSWER - houses and protects
DNA
What are chromosomes? - CORRECT ANSWER - structures of protein found in the
nucleus that carry genetic information
Where is the plasma membrane located and what is its function? - CORRECT ANSWER -
plasma membrane holds together the cell (eukaryotes and prokaryotes) and regulates the
exchange of water, gases, and nutrients in prokaryotes
Distinguish between somatic and sex cells - CORRECT ANSWER - somatic = mitotic
division, all over body, various types for different functions
sex = meitotic division, used for reproduction
Distinguish between sex and autosomal chromosomes. - CORRECT ANSWER - sex =
determines gender, 2
autosomal = non-sex chromosomes, 44
What is a centromere? - CORRECT ANSWER - region of chromosome that appears
"pinched". Region that fibers will attach to during cell division to separate.
Metacentric - CORRECT ANSWER - middle
submetacentric - CORRECT ANSWER - slightly off center middle
acrocentric - CORRECT ANSWER - towards end
telocentric - CORRECT ANSWER - located at end
Questions and CORRECT Answers
What are genes? - CORRECT ANSWER - DNA carries the code to make proteins within
cells.
Approx how many cells are located in your body? - CORRECT ANSWER - 100 trillion
What are chromosomes composed of? - CORRECT ANSWER - coiled DNA
5 types of atoms that make up DNA: - CORRECT ANSWER - hydrogen, oxygen,
nitrogen, carbon, phosphorus
Cells entrust the instructions for their construction and operation to_______. - CORRECT
ANSWER - DNA
What is meant by the phrase that DNA is a polymer? - CORRECT ANSWER - DNA is a
polymer means that it is a long molecule made up of small units linked together.
What type of bond holds the complementary bases together on the two strands of the double
helix? - CORRECT ANSWER - hydrogen bond
What is the function of the CCR5 gene, with respect to the HIV virus? - CORRECT
ANSWER - HIV uses the CCR5 protein as a landing pad prior to invading the cell.
Distinguish between prokaryotic and eukaryotic cells. - CORRECT ANSWER -
prokaryotic = no nucleus, bacteria
eukaryotic = nucleus, human
, What is the nucleus? What is its function? - CORRECT ANSWER - houses and protects
DNA
What are chromosomes? - CORRECT ANSWER - structures of protein found in the
nucleus that carry genetic information
Where is the plasma membrane located and what is its function? - CORRECT ANSWER -
plasma membrane holds together the cell (eukaryotes and prokaryotes) and regulates the
exchange of water, gases, and nutrients in prokaryotes
Distinguish between somatic and sex cells - CORRECT ANSWER - somatic = mitotic
division, all over body, various types for different functions
sex = meitotic division, used for reproduction
Distinguish between sex and autosomal chromosomes. - CORRECT ANSWER - sex =
determines gender, 2
autosomal = non-sex chromosomes, 44
What is a centromere? - CORRECT ANSWER - region of chromosome that appears
"pinched". Region that fibers will attach to during cell division to separate.
Metacentric - CORRECT ANSWER - middle
submetacentric - CORRECT ANSWER - slightly off center middle
acrocentric - CORRECT ANSWER - towards end
telocentric - CORRECT ANSWER - located at end
