Although bacteria can be used to produce proteins for therapeutic uses, what can be a disadvantage to using a prokaryotic system?
A) Proteins may not be post translationally processed correctly.
B) Transcripts from eukaryotic open reading frames are degraded quickly in prokaryotic cells.
C) Some prokaryotic promoters do not work well to transcribe eukaryotic open reading frames.
D) The structures that eukaryotic mRNAs fold into are frequently used as rho termination signals.
A) Proteins may not be post translationally processed correctly.
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Water molecules exhibit cohesive and adhesive properties. What is the chemical bond characteristic that contributes to these and other numerous important properties of water molecules?
A. The covalent bond strengths of water molecules change with pH, temperature, or solute conditions present. B. The covalent bonds that form water molecules transform to ionic bonds in presence of other molecules, temperature changes, or pH. C. Hydrogen bonds form between water molecules, not requiring gain, loss, or sharing of electrons. D. Bonds that form water are of the nonpolar covalent form. E. Ionic bonds between water molecules create increased surface tension.
Which structure(s) is(are) NOT included in the lymphatic system?
a. lymph nodes b. the spleen c. the thymus d. tonsils e. the thyroid
Aquatic animals that rely on external fertilization for reproduction have a low probability of successful fertilization. Which one of the following is not used by aquatic animals to increase the success of external fertilization?
A. production of a large number of gametes that are released simultaneously B. courtship rituals to synchronize male/female gamete release C. moving onto land for fertilization D. release of pheromones to synchronize male/female gamete release
Name the membrane-enclosed compartments in a eukaryotic cell where each of the functions listed below takes place
A. photosynthesis B. transcription C. oxidative phosphorylation D. modification of secreted proteins E. steroid hormone synthesis F. degradation of worn-out organelles G. new membrane synthesis H. breakdown of lipids and toxic molecules