Biology 1100 Exam 1 Questions with Correct
Answers
Characteristics of living organisms
Composed of one or more cell, reproduce using DNA, obtain energy from their environment,
sense their environment and respond to it, maintain a constant internal environment, can
evolve as groups, living
What is a hypothesis
An informed explanation for observations of the natural world
Independent variable
Single variable that is manipulated
Dependent variable
A variable that could respond to to the changes in the independent variable
Element
Is a pure substance composed of atoms and cannot be broken down into anything else's
Chemical reaction
Bonds between atoms are formed or broken
What element is found in organic molecules
What are three types of chemical bonds?
Covalent, ionic, and hydrogen
Attach atoms to one another
Solute
, A dissolved substance
Solvent
The fluid into which the solute has dissolved.
what does the Ph scale measure?
Hydrogen ion concentration
Polar molecule
A molecule whose electrical charge is shared unevenly, with some regions being electrically
negative and others electrically positive
Macromolecules
Organic molecules protein, carbohydrates, lipids, nucleic acids
What are the specific monomers used to build macromolecules
Protein carbohydrates and nucleic acids are polymers long strands of repeating units of small
molecules called
Monomers
What are the parts of cell theory
All living things are composed of one or more cells, and that all cells living today came from
pre existing cells
What is plasma membrane
Every cell is surrounded by plasma membrane
What does plasma membrane do?
Separates the chemical reactions inside the cell from the surrounding environment
Answers
Characteristics of living organisms
Composed of one or more cell, reproduce using DNA, obtain energy from their environment,
sense their environment and respond to it, maintain a constant internal environment, can
evolve as groups, living
What is a hypothesis
An informed explanation for observations of the natural world
Independent variable
Single variable that is manipulated
Dependent variable
A variable that could respond to to the changes in the independent variable
Element
Is a pure substance composed of atoms and cannot be broken down into anything else's
Chemical reaction
Bonds between atoms are formed or broken
What element is found in organic molecules
What are three types of chemical bonds?
Covalent, ionic, and hydrogen
Attach atoms to one another
Solute
, A dissolved substance
Solvent
The fluid into which the solute has dissolved.
what does the Ph scale measure?
Hydrogen ion concentration
Polar molecule
A molecule whose electrical charge is shared unevenly, with some regions being electrically
negative and others electrically positive
Macromolecules
Organic molecules protein, carbohydrates, lipids, nucleic acids
What are the specific monomers used to build macromolecules
Protein carbohydrates and nucleic acids are polymers long strands of repeating units of small
molecules called
Monomers
What are the parts of cell theory
All living things are composed of one or more cells, and that all cells living today came from
pre existing cells
What is plasma membrane
Every cell is surrounded by plasma membrane
What does plasma membrane do?
Separates the chemical reactions inside the cell from the surrounding environment
