Bio 111 test #1 Questions and Answers |Complete Solutions Graded A+|100% Correct
What can affect enzyme function? What do these things do to enzyme function? Denatured
affects change, shape of cell so how can it function.
List examples of molecules that can freely move through the selectively permeable cell
membrane as well as those that require protein carriers. Osmosis
simple diffusion particles(solutes) move from high concentration to low concentration—that
is, they move down their concentration gradient.
facilitated diffusion- form of passive transport in which a substance moves down its
concetration ingredient with the aid of a transport protein.
osmosis the movement of water down its concentration gradient, is also a type of passive
transport.
active transport the cell uses energy and a transport protein to move a substance against its
concentration gradient
What happens to cells in hypertonic, hypotonic, and isotonic environments? Hypertonic-cell
shrivels due to loss of water. Shrinks
Hypotonic-cell fills bursting due to gain of water. Swell
Isotonic-same=equal
Endocytosis allows a cell to engulf fluids and large molecules and bring them into the cell
Exocytosis uses vesicles to transport substances out of cells.
What are the distinguishing characteristics of living things? All life shares five characteristics.
, #1 Biological levels of organization
-Protons,neutrons,electrons form atoms
-Atoms combine to make molecules
-Molecules make up parts of cells
-Cells create tissues (if multicellular)
- Tissues together make organs
- Organs and organ sytems make up organisms (unless unicellular)
List the levels of life's organizational hierarchy from smallest to largest(Biological levels of
Organization) Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Oganism
Popuation
Community
Ecosystem
Biosphere
How can natural selection and mutation play a role in evolution? Natural Selection = those
individuals with the greatest fitness (fitness= reproductive and survival success)
What are the distinguishing characteristics of the 3 domains of life? Domain bacteria. No
nuclei
Domain Archea-No nuclei
What can affect enzyme function? What do these things do to enzyme function? Denatured
affects change, shape of cell so how can it function.
List examples of molecules that can freely move through the selectively permeable cell
membrane as well as those that require protein carriers. Osmosis
simple diffusion particles(solutes) move from high concentration to low concentration—that
is, they move down their concentration gradient.
facilitated diffusion- form of passive transport in which a substance moves down its
concetration ingredient with the aid of a transport protein.
osmosis the movement of water down its concentration gradient, is also a type of passive
transport.
active transport the cell uses energy and a transport protein to move a substance against its
concentration gradient
What happens to cells in hypertonic, hypotonic, and isotonic environments? Hypertonic-cell
shrivels due to loss of water. Shrinks
Hypotonic-cell fills bursting due to gain of water. Swell
Isotonic-same=equal
Endocytosis allows a cell to engulf fluids and large molecules and bring them into the cell
Exocytosis uses vesicles to transport substances out of cells.
What are the distinguishing characteristics of living things? All life shares five characteristics.
, #1 Biological levels of organization
-Protons,neutrons,electrons form atoms
-Atoms combine to make molecules
-Molecules make up parts of cells
-Cells create tissues (if multicellular)
- Tissues together make organs
- Organs and organ sytems make up organisms (unless unicellular)
List the levels of life's organizational hierarchy from smallest to largest(Biological levels of
Organization) Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Oganism
Popuation
Community
Ecosystem
Biosphere
How can natural selection and mutation play a role in evolution? Natural Selection = those
individuals with the greatest fitness (fitness= reproductive and survival success)
What are the distinguishing characteristics of the 3 domains of life? Domain bacteria. No
nuclei
Domain Archea-No nuclei
