Ch. 3 reading quiz (cellular level of organization)

the nucleus and mitochondria share which of the following features? a. a double cell membrane b. protein-lined membrane pores c. the production of cellular energy d. the synthesis of ribosomes

A. a double cell membrane

what multipotent stem cells from children are sometimes banked by parents? a. cells from umbilical cord and from baby teeth b. fetal stem cells c. embryonic stem cells d. hematopoietic stem cells from red and white blood cells

A. cells from umbilical cord and from baby teeth

the rough ER has its name due to what associated structures? a. ribosomes b. proteins c. golgi apparatus d. lysosomes

A. ribosomes

which of the following phases is characterized by preparation for DNA synthesis? a. S b. G1 c. interphase d. G0

B. G1

which of the following is not made out of RNA? a. an intron b. a ribosome c. the messenger molecule that provides the code for protein synthesis d. the carriers that shuffle amino acids to a growing polypeptide strand

B. a ribosome

how many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid? a. 4 b. 1 c. 3 d. 2

C. 3

which of the following sequences on a DNA molecule would be complementary to GCTTATAT? a. ATCCGCGC b. TAGGCGCG c. CGAATATA d. TGCCTCTC

C. CGAATATA

ion pumps and phagocytosis are both examples of ______. a. facilitated diffusion b. passive transport c. active transport d. endocytosis

C. active tranaport

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

C. they are all polymers of protein subunits

which of the following is not a difference between DNA and RNA? a. RNA is single stranded and DNA is double stranded b. DNA contains deoxyribose and RNA contains ribose c. DNA contains thymine whereas RNA contains uracil d. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars

D. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars

place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome a. nucleosome, DNA, chromosome, chromatin b. nucleosome, chromatin, DNA, chromosome c. DNA, chromatin, nucleosome, chromosome d. DNA, nucleosome, chromatin, chromosome

D. DNA, nucleosome, chromatin, chromosome

which of the following is part of the elongation step of DNA synthesis? a. pulling apart the two DNA strands b. none of these answers c. untwisting the DNA helix d. attaching complementary nucleotides to the template strand

D. attaching complementary nucleotides to the template strand

the diffusion of substances within a solution tends to move those substances _____ their _____ gradient. a. up; electrochemical b. down; pressure c. up; electrical d. down; concentration

D. down; concentration

which of the following organelles produces large quantities of ATP when glucose and oxygen are available to the cell? a. peroxisomes b. lysosomes c. endoplasmic reticulum d. mitochondria

D. mitochondria

arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotnecy a. multipotency, pleuripotency, oligopotency, unipotency b. pleuripotency, oligopotency, multipotency, unipotency c. oligopotency, pleuripotency, unipotency, multipotency d. pleuripotency, multipotency, oligopotency, unipotency

D. pleuripotency, multipotency, oligopotency, unipotency