Exam (elaborations)
Biology 151 - Exam 2 Questions answers latest update
- Course
- BIOL 151
- Institution
- University Of Wisconsin - Madison
Biology 151 - Exam 2 Questions answers latest update
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Biology 151 - Exam 2Large numbers of ribosomes are present in cells that produce which of the
following molecules? - proteins
What is an incorrect statement about the synthesis of polypeptides (proteins)? -
The synthesis of proteins is a catabolic process.
What are constituents of the nucleus? - Pores, envelope or membrane,
chromosomes, chromatin
Tissues that are metabolically active and utilize large amounts of energy would be
rich in _____. - mitochondria.
What is important for allowing large, charged molecules to pass through the
membrane? - membrane proteins
What are some true statements regarding active transport? - - It requires energy
- It is an active process in which molecules move from a region of lower
concentration to one of higher concentration
- It requires integral proteins
- It is necessary to maintain solute gradients across a membrane
, What are some true statements about plasma membranes? - - They are
composed of phospholipids
- They have both integral and peripheral proteins
- They are composed of two leaflets of phospholipids
- They function to separate the extracellular and intracellular environment
Of the following molecules, which passes through a lipid bilayer most readily
(easily)?
a. carbon dioxide
b. glucose
c. K+
d. arginine
e. RNA - a. carbon dioxide
What is true about about passive diffusion? - - Passive diffusion is the process by
which molecules move from an area of high concentration to an area of low
concentration
- Passive diffusion is a spontaneous process
- Passive diffusion will occur so long as the membrane is freely permeable to the
solute
- Passive diffusion requires no energy
The release of insulin from pancreatic cells occurs by _____. - exocytosis.
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