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cell exam 1
Exam 1
| Question | Answer |
|---|---|
| In an electron micrograph, electron dense regions are dark regions. | True |
| Archaea, like bacteria divide by mitosis. | False |
| Archaea, like eukaryotes are about 1-10um's | False |
| Archaea are closer to eukarya than bacteria. | True |
| Even though archaea and bacteria are structurally prokaryotic cells, taxonomically they belong to 2 different domains. | True |
| Diffusion is from low concentration to high concnetration. | False |
| As a cells volume doubles, its surface area triples. | False |
| Glycogen, starch, and cellulose contain alpha(1-4)glycosidic bonds | False |
| Most bacteria contain a single chromosome | True |
| Sphingosine is part of the structure of both glycolipids and some phospholipids | True |
| The development of microtome in the 1800's is part of cytology, not biochemistry or genetics | True |
| RNA is longer than DNA | False |
| All proteins have a primary structure, but not all have a quaternary structure. | True |
| Any of the 20 amino acids have potential to form disulfide bonds. | False |
| Nonspontaneous reactions are endergonic | True |
| Proteins, nucleic acids, polysaccharides, and lipids are all very long polymers that are synthesizd by the condensation of individual monomers. | False |
| Extremes of pH have no effect on protein tertiary structure | False |
| In feedback inhibition, allosteric enzyme is an enzyme early in the pathway to the final product and the final product is the allosteric activator. | False |
| Watson and Crick described the structure of DNA in 1963. | False |
| Size range for a typical prokaryotic cell | 1-10um’s |
| Fatty acids with one or more double bonds are | -unsaturated |
| +NH3 is called a __ group | -amino |
| Which cell structure is in electron micrograph pic? - | mitochondrion |
| The presence or absence of this functional grpoup is what distinguishes a nucleoside from a nucleotide | -Phosphate |
| Bacterial cells that get its energy from chemical bonds and its Carbon from CO2 is a | -chemoautotroph |
| The type of glycosidic bonds found in cellulose | -β(1-4) |
| The base is guanosine, what is full name of DNA nucleotide that has this base and 1 phosphate group | -deoxyguanosine monophosphate |
| A common method of enzyme regulation is covalent modification. Name a typical chemical group that is added or removed from enzymes in covalent modification. | -phosphate/methyl/acetyl |
| Lipids are ___, a term that means they have both hydrophobic and hydrophilic regions | -amphipathic |
| Fatty acids have this functional group and end of a long hydrocarbon chain | -COOH |
| When measuring free energy under standard conditions, what is the standard temperature in K? | 298 K |
| Mitochondria | Animal and plant |
| Peptidoglycan | bacteria |
| Nucleus | animal and plant |
| Chloroplasts | plant |
| Ribosomes | animal, plant, and bacteria |
| Wall | plant and bacteria |
| Largest most dense (pellets 1st when centrifuging) | -nucleus |
| H2O2 | -Peroxisomes |
| Help to pull chromosomes apart during mitosis/meiosis | -microtubules |
| 7nm’s | -microfilaments |
| Region where you find DNA in prokaryotic cell | -nucleoid |
| Formation of ribosomal subunits (eukaryotic cells) | -nucleolus |
| Lipid synthesis | -smooth ER |
| Sorting of proteins | -Gogli Complex |
| Envelope | -nucleus |
| Low pH | -lysosomes |
Created by:
jd56138
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