quiz 1.2 cell phys
The ________ encloses the cell and regulates the passage of substances into and out of the cell: A. golgi apparatus B. endoplasmic reticulum C. nucleus D. cell membrane
cell membrane
Phospholipids are the building blocks of: A. proteins B. DNA C. RNA D. cell membranes E. none of the above
cell membranes
What do ribosomes use to determine what order the amino acids are sequenced: A. mRNA B. cDNA C. dRNA D. phospholipids E. none of the above
mRNA
Every three nucleic acids codes for a single amino acid: A. this is the definition of a binucleotide B. this is the definition of a binucleoside C. this is the definition of a codon D. all of the above E. none of the above
this is the definition of codon
Which is the recipe for a phospholipid: A. one phosphate and one lipid B. one phosphate and two lipids C. one fatty acid and two phosphates D. two fatty acids, a phosphate and a glycerol E. none of the above
two fatty acid and two phosphates
Nucleotides are the building blocks of: A. DNA B. RNA C. both of the above
Both of the above
Amino acids have which of the following: A. carboxylic acid moiety B. amino moiety C. alpha carbon D. R-group, side chain or variable group E. all of the above F. none of the above
all of the above
Which of the following is important in energy transfer: A. kinase B. phosphate C. ATP D. electrons E. all of the above
all of the above
Which of the following is a protein: A. immunoglobulin B. hemoglobin C. protease D. transcriptase E. kinase F. all of the above are proteins
all of the above are proteins
ATP is: A. used in DNA and RNA production B. used to make the second messenger cyclic AMP C. used as an energy source D. all of the above E. none of the above
all the above
Which is true about mitochondria: A. Produce ATP for the cell B. mitochondria have their own DNA. C. mitochondrial DNA is 100% from the mother D. all of the above E. none of the above
all the above
When polypeptide chains forms a spring shape, this is called: A. alpha helix B. beta pleated sheet C. none of the above
alpha helix
When polypeptide chains form a very strong, tough structure, this is called: A. alpha helix B. beta pleated sheet C. none of the above
beta pleated sheet
Which of the following is determined by the amino acid sequence: A. alpha helixes and beta sheets (secondary structure) B. globular and conformational structure (tertiary and quaternary structure) C. both of the above D. none of the above
both are correct
Proteins are: A. chains of amino acids B. made by ribosomes C. both of the above
both of the above
All creatures organize their metabolic machinery into small organizational packets called: A. golgi apparatus B. endoplasmic reticulum C. cells D. nucleic acids
cells
The ________ is where ribosomal RNA is stored. A. nucleus B. phospholipids C. nucleolus D. carbohydrates
nucleolus
The DNA plans for protein synthesis are in the: A. nucleus B. phospholipids C. ribosomes D. carbohydrates
nucleus
The _________ is the cell's control center. A. nucleus B. phospholipids C. ribosomes D. carbohydrates
nucleus
Amino acids are the building blocks of: A. proteins B. DNA C. RNA D. cell membranes E. none of the above
proteins
The difference between smooth and rough endoplasmic reticulum is: A. nucleic acids B. phospholipids C. ribosomes D. carbohydrates
ribosomes
What determines the formation of alpha helixes or beta sheets? A. the number of lipids on the phospholipid B. the number of base pairs in the nucleolus C. the sequence of amino acids D. none of the above
the sequence of amino acids