Which of the following describes a lysosome?
A) A double-membraned organelle that is the "powerhouse" of the cell
B) A tiny, membranous sac that contains enzymes that degrade worn cell parts and
debris
C) A nonmembranous structure that is essential for mitosis
D) A complex network of interconnected membranes that is a communication system
in the cell
B
You might also like to view...
Phospholipids
a. consist of a polar, hydrophilic, phosphate-bearing, head and two nonpolar hydrophobic, fatty-acid tails. b. are aligned in a lipid bilayer in membranes. c. serve as carrier molecules. d. only (a) and (b) above. e. all of these answers.
When water is lost, but electrolytes are retained,
A) the osmolarity of the ECF falls. B) osmosis moves water from the ICF to the ECF. C) both the ECF and the ICF become more dilute. D) there is an increase in the volume of the ICF. E) aldosterone is secreted.
Fat digestion is carried out by the enzyme ________, which breaks down triglyceride into ________.
Fill in the blank(s) with the appropriate word(s).
Haustra are pocket-like sacs of the small intestine
Indicate whether the statement is true or false