Molecular Cell Biology, Study guides, Class notes & Summaries

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. (d) The cytoskeleton of a cell can change in response to the environment. - CORRECT ANSWER-(c) Covalent bonds between protein monomers hold together cytoskeletal filaments. Which of the following ...

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 determining the overall protein factor. True or False: The "polypeptide backbone" refers to all atoms in a polypeptide chain, except for those that form the peptide bonds. - CORRECT ANSWER-False...

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 ___________ cells was tested by injecting the mixture into mice. Only the fraction containing ________ was able to ______________ the ______________ cells to _____________(or __________) cells that coul...

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 __________________________________. (a) after many rounds of DNA replication, the original DNA double helix is still intact. (b) each daughter DNA molecule consists of two new strands copied form the...

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 secrete digestive enzymes. c. Cells can take in and use nutrients. d. Cells can synthesize fats. - CORRECT ANSWER-ANS: C In metabolic absorption, all cells take in and use nutrients and other substanc...

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 excess of nutrients available in the human body, insulin is released to stimulate the synthesis of glycogen from glucose. This is a specific example of a(n) __________ process, a general process in w...

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 - CORRECT ANSWER-(c) template DNA replication is considered semiconservative because - CORRECT ANSWER-(c) each daughter DNA molecule consists of one strand from the parents DNA molecules and one new strand (d) true, but not correct - new DNA strands must be copied from a DNA template The classic experiments conducted by Meselson and Stahl demons...

Test Bank for Molecular Cell Biology, Harvey Lodish, Berk, Kaiser et al., 9th Edition. All 25 Chapters. 249 Pages