PLTW PBS Final Review Latest Update 2024- 2025 100% Complete 170 Questions and Verified Correct Answers Already Graded A+
46 - CORRECT ANSWER: How many chromosomes does a human have in each cell?
5 pieces of evidence that may be found at a crime scene. - CORRECT ANSWER:
Clothing, Drugs/Meds, food, DNA, and Identification.
A building block of DNA, consisting of a five-carbon sugar covalently bonded to a
nitrogenous base and a phosphate group. - CORRECT ANSWER: nucleotide
a chromosome that is not directly involved in determining sex, as opposed to a sex
chromosome - CORRECT ANSWER: autosome
A component of nucleic acid that carries hereditary information in DNA in cells.
Chemically, it is a pyrimidine base. - CORRECT ANSWER: thymine
A component of nucleic acids that carries hereditary information in DNA and RNA in
cells. Chemically, it is a purine base. - CORRECT ANSWER: guanine
A component of nucleic acids that carries hereditary information in DNA and RNA in
cells. Chemically, it is a pyrimidine base. - CORRECT ANSWER: cytosine
A component of nucleic acids, energy-carrying molecules such as ATP, and certain
coenzymes. Chemically, it is a purine base. - CORRECT ANSWER: adenine
A condition that appears only in individuals who have received two copies of a mutant
gene, one copy from each parent. - CORRECT ANSWER: recessive trait
A diagram of a family tree showing the occurrence of heritable characters in parents
and offspring over multiple generations. - CORRECT ANSWER: pedigree
a discrete unit of hereditary information - CORRECT ANSWER: gene
A discrete unit of hereditary information consisting of a specific nucleotide sequence in
DNA (or RNA, in some viruses). - CORRECT ANSWER: gene
a genetic trait that is expressed in a person who has only one copy of the gene
associated with the trait - CORRECT ANSWER: dominant trait
A person with sickle cell trait will not show any symptoms of having the disease, while
someone with the disease will. - CORRECT ANSWER: What is the difference between
someone having the sickle cell trait and having sickle cell anemia? 1 / 2
A process of disintegration or dissolution (as of cells). - CORRECT ANSWER: lysis
a rare change in the genetic material, ultimately creating genetic diversity - CORRECT
ANSWER: mutation
A simplified version of something complex used, for example, to analyze and solve
problems or make predictions. - CORRECT ANSWER: model
A small protein with a high proportion of positively charged amino acids that binds to the negatively charged DNA and plays a key role in its chromatin structure. - CORRECT
ANSWER: histone
A solution that minimizes changes in pH when extraneous acids or bases are added to
the solution. - CORRECT ANSWER: buffer
A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar
covalent bond in another molecule. - CORRECT ANSWER: hydrogen bond
any of the usually linear bodies in the cell nucleus that contain the genetic material -
CORRECT ANSWER: chromosome
Because sickle cell is recessive. - CORRECT ANSWER: Why does sickle cell disease run in families, yet is not present in every generation?
capable of being transmitted from person to person, animal to animal, animal to human,
or human to animal by contact - CORRECT ANSWER: contagious
Dehydration Synthesis - CORRECT ANSWER: Molecule is built by taking a water out.(Opposite of Hydrolysis)
display of the chromosome pairs of a cell arranged by size and shape - CORRECT
ANSWER: karyotype
Explain the process of calorimtery. (Not sure if this is right!!) - CORRECT ANSWER: Ignite food and measure the increase in temp. of water due to the heat given off by the burning.
Feedback relationship of blood glucose and the hormones insulin and glucagon. (High
Blood Glucose Levels) (Not sure if this is right!!) - CORRECT ANSWER: Pancreas
produces Insulin by beta cells -> Fat cells take in glucose from blood-> Normal Levels achieved.
Feedback relationship of blood glucose and the hormones insulin and glucagon. (Low Blood Glucose Levels) (Not sure if this is right!!) - CORRECT ANSWER: Pancreas
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