Homework 3: cells

which of the following organelles produces large quantities of ATP with both glucose and oxygen are available to the cell? A. mitochondria B. peroxisomes C. lysosomes D. ER

A. mitochondria

transcription and translation take place in the ____ and ____, respectively A. nucleus; cytoplasm B. nucleolus; nucleus C. nucleolus; cytoplasm D. cytoplasm, nucleus

A. nucleus; cytoplasm

which of the following is a function of the rough ER? A. production of proteins B. Detoxification of certain substances C. synthesis of steroid hormones D. Regulation of intracellular calcium concentration

A. production of proteins

which of the following phases is characterized by preparation for a DNA synthesis? A. G0 B. G1 C. G2 D. S

B. G1

which of the following structures could be found within the nucleolus? A. Pulling apart the two DNA strands B. attaching complementary nucleotides to the template strand C. untwisting the DNA helix D. none of the above

B. attaching complementary nucleotides to the template strand

because they are in bedded within the membrane ion channels are examples of A. receptor proteins B. integral proteins C. peripheral proteins D. glycoproteins

B. integral proteins

choose the answer the best completes the following analogy: diffusion is to _____ as endocytosis is to ____. A. filtration; phagocytosis B. osmosis; pinocytosis C. solutes; fluid D. gradient; chemical energy

B. osmosis; pinocytosis

The rough ER has its name due to what associated structures? A. golgi apparatus B. ribosomes C. lysosomes D. proteins

B. ribosomes

how many "letters" of an RNA molecule in sequence does it take to provide the code for a single amino acid? A. 1 B. 2 C. 3 D. 4

C. 3

Ion pumps and phagocytosis are both examples of ________. A. endocytosis B. passive transport C. active transport D. facilitated diffusion

C. active transport

The diffusion of substances within a solution tends to move those substances ____ their ____ gradient A. up; electrical B. up; electrochemical C. down; pressure D. down; concentration

D. down; concentration

The nucleus and mitochondria share which of the following features? A. Protein lined membrane pores B. A double cell membrane C. The synthesis of ribosomes D. The production of cellular energy

b. a double cell membrane

which of the following is a feature common to all three components of the cytoskeleton? A. they all serve to scaffold the organelles within the cell B. they are all characterized by roughly the same diameter C. they are all polymers of protein subunits D. they all help the cell resist compression and tension

c. They are all polymers of protein subunits.