Molecular Cell Biology,

Chemical reactions carried out by living systems depend on the ability of some organisms to capture and use atoms from nonliving sources in the environment. The specific subset of these reactions that break down nutrients in food can be described as - CORRECT ANSWER-(b) catabolic When there is an...

what is the correct order of a normal cell cycle A. M phase B. S PHASE C. G1 phase D. G2 phase - CORRECT ANSWER-C. G1 phase B. S PHASE D. G2 phase A. M phase Which statement best describes the cellular function of metabolic absorption? a. Cells can produce proteins. b. Cells can secre...

The process of DNA replication requires that each of the parental DNA strands be used as a ____________ to produce a duplicate of the opposing strand. (a) catalyst (b) competitor (c) template (d) copy - CORRECT ANSWER-(c) template DNA replication is considered semiconservative because ___...

Cell-free extracts from S-strain cells of S. pneumoniae were fractioned to ______________ DNA, RNA, protein, and other cell components. Each fractions was then mixed with ______________ cells of S. pneumoniae. Its ability to change these into cells with _________________ properties resembling the __...

True or false: Generally, the total number of nonpolar amino acids has a greater affect on protein structure than the exact order of amino acids in a polypeptide chain. - CORRECT ANSWER-False. The order in which amino acids are linked is unique for each protein and is the most important factor in ...

Which of the following statements about the cytoskeleton is false? (a) The cytoskeleton is made up of three types of protein filaments. (b) The cytoskeleton controls the location of organelles in eukaryotic cells. (c) Covalent bonds between protein monomers hold together cytoskeletal filaments. ...

Chemical reactions carried out by living systems depend on the ability of some organisms to capture and use atoms from nonliving sources in the environment. The specific subset of these reactions that break down nutrients in food can be described as _________________. (a) metabolic (b) catabolic ...

Chemical reactions in living systems occur in an ____________________ environment, within a narrow range of temperatures. (a) optimal (b) organic (c) extracellular (d) aqueous - CORRECT ANSWER-(d) aqueous True or false: The chemistry of life is carried out and coordinated primarily by the...

11-1 Which of the following phenomena will be observed if a cell's membrane is pierced? (a) the membrane reseals (b) the membrane collapses (c) a tear is formed (d) the membrane expands - CORRECT ANSWER-A 11-2 The plasma membrane serves many functions, many of which depend on the presence of...

16-1 Cell lines A and B both survive in tissue culture containing serum but do not proliferate. Factor F is known to stimulate proliferation in cell line A. Cell line A produces a receptor protein (R) that cell line B does not produce. To test the role of receptor R, you introduce this receptor prot...

18-1 The four phases of the cell cycle, in order, are G1, __________________, __________________, and __________________. A cell contains the most DNA after __________________ phase of the cell cycle. A cell is smallest in size after __________________ phase of the cell cycle. Growth occurs in _...

20-1 Both multicellular plants and animals have _____________________. (a) cells capable of locomotion. (b) cells with cell walls. (c) a cytoskeleton composed of actin filaments, microtubules, and intermediate filaments. (d) tissues composed of multiple different cell types. - CORRECT ANSWER-D ...

Both multicellular plants and animals have _____________________. (a) cells capable of locomotion. (b) cells with cell walls. (c) a cytoskeleton composed of actin filaments, microtubules, and intermediate filaments. (d) tissues composed of multiple different cell types. - CORRECT ANSWER-d Whi...

For a protein to be an integral membrane protein, it would have to be _____. - CORRECT ANSWER-amphipathic, with at least one hydrophobic region You have a planar bilayer with equal amounts of saturated and unsaturated phospholipids. After testing the permeability of this membrane to glucose, you ...