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