BIO 1201 Exam 1- Chialvo UPDATED
Exam Questions and CORRECT Answers
explain the assumptions of cell theory - CORRECT ANSWER - 1- composed of cells
2- cells need to arise from pre-existing cells
3- energy flow (metabolism) that occurs within the cells
4- genetic information that is stored in the cell and can be passed down to new cells
eukaryotic structures - CORRECT ANSWER - 1- nucleus
2- ER
3- golgi body
4- mitochondrion
5- lysosomes
6- peroxisomes
7- ribosomes
nucleus - CORRECT ANSWER - regulates all activity/behavior of the cell
ER - CORRECT ANSWER - local transport of materials (rough: proteins; smooth: lipids)
golgi body - CORRECT ANSWER - packaging/tagging/transporting of materials out of
the cell
mitochondrion - CORRECT ANSWER - supplies chemical energy (ATP) to the cell
lysosomes - CORRECT ANSWER - recycle old cellular material and also destroying
pathogens
, peroxisomes - CORRECT ANSWER - digest and break down cellular material; neutralize
reactive oxygen compounds
ribosomes - CORRECT ANSWER - manufacture proteins
explain how the cell membrane is put together and properties it has - CORRECT
ANSWER - - phospholipid bilayer
- hydrophilic heads, hydrophobic tails
- selectively permeable
-transport/ transmembrane proteins
explain the behavior of concentration gradients - CORRECT ANSWER - -there is an area
of high concentration and an area of relatively low concentration
-as a result, the molecules will move from high to low concentrations (down)
explain the differences between the three types of cellular transport - CORRECT
ANSWER - passive transport/diffusion- small molecules are going to move across the
membrane without the assistance of either transport proteins or energy (moving down a
concentration gradient)
facilitated transport- larger molecules are going to move across the membrane with assistance of
transport proteins and the use of AT{ energy (moving up a concentration gradient)
active transport- larger molecules are going to move across the membrane with assistance of
transport proteins and the use of ATP energy (moving up a concentration gradient)
explain the differences between the three types of tonicity - CORRECT ANSWER -
hypotonic- outside environment has a LOWER concentration of solute than inside the cell (water
is going to enter the cell)
hypertonic- outside environment has a HIGHER concentration of solute than inside the cell
(water is going to leave the cell)
isotonic- outside and inside environment have the same concentration of solute (water is going to
flow back and forth at an even rate)
Exam Questions and CORRECT Answers
explain the assumptions of cell theory - CORRECT ANSWER - 1- composed of cells
2- cells need to arise from pre-existing cells
3- energy flow (metabolism) that occurs within the cells
4- genetic information that is stored in the cell and can be passed down to new cells
eukaryotic structures - CORRECT ANSWER - 1- nucleus
2- ER
3- golgi body
4- mitochondrion
5- lysosomes
6- peroxisomes
7- ribosomes
nucleus - CORRECT ANSWER - regulates all activity/behavior of the cell
ER - CORRECT ANSWER - local transport of materials (rough: proteins; smooth: lipids)
golgi body - CORRECT ANSWER - packaging/tagging/transporting of materials out of
the cell
mitochondrion - CORRECT ANSWER - supplies chemical energy (ATP) to the cell
lysosomes - CORRECT ANSWER - recycle old cellular material and also destroying
pathogens
, peroxisomes - CORRECT ANSWER - digest and break down cellular material; neutralize
reactive oxygen compounds
ribosomes - CORRECT ANSWER - manufacture proteins
explain how the cell membrane is put together and properties it has - CORRECT
ANSWER - - phospholipid bilayer
- hydrophilic heads, hydrophobic tails
- selectively permeable
-transport/ transmembrane proteins
explain the behavior of concentration gradients - CORRECT ANSWER - -there is an area
of high concentration and an area of relatively low concentration
-as a result, the molecules will move from high to low concentrations (down)
explain the differences between the three types of cellular transport - CORRECT
ANSWER - passive transport/diffusion- small molecules are going to move across the
membrane without the assistance of either transport proteins or energy (moving down a
concentration gradient)
facilitated transport- larger molecules are going to move across the membrane with assistance of
transport proteins and the use of AT{ energy (moving up a concentration gradient)
active transport- larger molecules are going to move across the membrane with assistance of
transport proteins and the use of ATP energy (moving up a concentration gradient)
explain the differences between the three types of tonicity - CORRECT ANSWER -
hypotonic- outside environment has a LOWER concentration of solute than inside the cell (water
is going to enter the cell)
hypertonic- outside environment has a HIGHER concentration of solute than inside the cell
(water is going to leave the cell)
isotonic- outside and inside environment have the same concentration of solute (water is going to
flow back and forth at an even rate)
