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28 Cards in this Set
- Front
- Back
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What is the purpose of the cell wall for both prokaryotes and plant cells?
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to protect the cell from the effects of a hypotonic environment
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A series of hydrophobic side chains will congregate together as a protein folds in an aqueous solution and be stabilized by...
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Van der Waals interaction
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Phospholipids can form all of the following structures in water except which one?
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monolayers
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Why did the five-kingdom system of classification fall out of favor?
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it did not reflect the actual evolutionary relationships among organisms very well
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Which of the following would not be a good reason for studying SSU RNA to understand the major branches in the evolutionary history of life?
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it mutates very frequently
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What will happen to a red blood cell which has an internal ion concentration of about .9 %, if it is placed into a beaker of pure water?
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the cell would swell because the water in the beaker is hypotonic relative to the ctyoplasm of the red blood cell.
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What is the site of synthesis of proteins for export?
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ribosomes that attatch to the endoplasmic reticulum
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A peptide bond is...
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a covalent bond
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Which of the following includes all of the pyrymidines found in RNA and or DNA?
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Cytosine, Uracil, thymine
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What type of interaction is directly responsible for the formation of secondary structure?
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hydrogen bonds formed between sections of the polypeptide backbone
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How does the structure of an amino acid enable it to play its most important role in cells?
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the presence of carboxyl and amino groups gives it the ability to form peptide bonds, and its side chain gives it unique chemical properties
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What do phospholipids and triglycerides have in common?
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they both have a glycerol backbone
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Which of the following is not an effect of mitosis-promoting factor (MPF) involved in moving a cell into M phase?
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degradation of cyclin-dependent kinase
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In human and many other eukaryotic species' cells, the nuclear membrane has to dissapear in order for what to take place?
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attachment of mitotic spindle to kinetochores
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Which of the following terms is best described by the following statement? "an allele of one gene can mask the effect of an allele at another gene"
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epistasis
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If cancer cells detach from neighboring cells, what is a likely outcome of this event?
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loss of desmosomes
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In the process of chromosome separation, how do microtubules maintain contact with the kinetochores and shorten at the same time?
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motor proteins move chromosomes down the microtubular structures of the mitotic spindle
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Intercalated disks are cell-cell junctions found between cardiac muscle cells. A feature of intercalated disks is a large number of gap junctions. this means that...
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water and small ions can readily pass from one cardiac muscle to the next
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Integrins are integral membrane proteins. they are often attached to...
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cytoskeletal proteins and molecules of the extracellular matrix
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For the duration of meiosis 1, each chromosome is...
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two sister chromatids joined by a centromere
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At what stage of meiosis does DNA replication take place?
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None. DNA replication occurs before meiosis 1 begins
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What is the correct order of events in generating a recombinant plasmid?
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restriction enzyme treatment, ligation, transformation
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Why are plasmids useful for generating recombinant DNA?
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they are small and eaasy to manipulate AND when the host cell undergoes mitosis, both cells can inherit the plasmid
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Which of the following statements about eukaryotic genomes is False?
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complex organisms such as humans have many more genes than simpler organisms such as mustard plants
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Why are VNTR's useful markers for linking DNA evidence from crime scenes to potential suspects?
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they are hypervariable AND the same set of primers can be used to reveal VNTR differences between multiple suspects
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Which of the following does not occur in plants?
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gastrulation
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A mutant strain of sea urchin species that does not make bindin is found. What phenotype do you expect to observe?
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its sperm cannot fertilize eggs
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Which of the following does not arise from the mesoderm?
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nervous system
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