Submitted by Irene Chang  If the pressure for He was at 1 atm and the pressure for Ar was at 3 atm, which particle travels at a higher velocity? Click “Read More” to see the answer.  They both have the same velocity because velocity does not depend on pressure. 

Written by Merel Dagher (PEACE Advisor)  Which of the following don’t have vascular tissue? a.     Lycophytes b.     Ferns c.     Moss d.     Gingkophyta e.     Flowers Click “Read More” to see the right answer.  The correct answer is c. Lycophytes have tracheids. Ferns are pterophyta that have developed a vascular system, as with Ginkgos (which are...

Written by Merel Dagher (PEACE Advisor) Draw the polypeptide, given this amino acid sequence: RGFLSP Click “Read More” to see the answer.  Just one note on the picture -There should be an extra H on the first Nitrogen of the Arg.

Written by Merel Dagher (PEACE Advisor)  Match the fungal type with the correct description. a.     Chytridiomycota: flagellated spores b.     Zygomycota: fruiting body containing basidia that produce sexual spores c.     Glomeromycota: sexual spores borne internally in sacs called asci d.     Ascomycota: resistant zygosporangium as sexual stage e.     Basidiomycota: form arbuscular mycorrhizae with plantsClick “Read More”...

Written by Merel Dagher (PEACE Advisor) Select all that apply regarding the correct definition of the isoelectric point of peptides (More than one may be correct):   a.     At the pI, the net charge of the molecule is zero b.     At pI, the the carboxy group is deprotonated and the amino group is protonated....

Written by Merel Dagher (PEACE Advisor) Which of the following is the basal member of Archaeplastida? a.     Glaucophytes b.     Red Algae c.     Chlorophytes d.     “Charophytes” e.     Land PlantsClick “Read More” to see the answer.  The correct answer is a. Both Chlorophytes and “Charophytes” belong to the informal group Green Algae. “Charophytes” are semi-terrestrial, making...

Written by Merel Dagher (PEACE Advisor)  How might we isolate cytosolic proteins from tissues, in order to purify them? a.     centrifuge the tissue at low speed; the protein is in the pellet b.     centrifuge the tissue at medium speed; the protein is in the pellet c.     centrifuge the tissue at high speed; the protein...

Written by Merel Dagher (PEACE Advisor)  Compare and contract the lifecycle of Brown Algae (a Chromalveolata) and Ulva (a type of “green algae”): a.     Only brown algae have a haplodiplontic life cycle b.     Both have a haplontic life cycle c.     Ulva has isomorphic gametophytes and sporophytes d.     Brown algae have isomorphic gametophytes and sporophytes e.     Ulva...

Written by Merel Dagher (PEACE Advisor)  After we get our desired proteins, how can we test to see if the protein we want to purify is in the sample of proteins? (More than one answer choice may be correct)  a.     perform a colorimetric assay b.     perform a radiochemical assay c.     perform an immunological assay...

Written by Merel Dagher (PEACE Advisor)  Which of the following belong to the kingdom Chromalveolata? Select all that apply. a.     Dinoflagellates b.     Oomycetes c.     Ciliates d.     Diatoms e.     Brown Algae f.      All of the above.  The correct answer is F. All of the following belong to the Chromalveolata kingdom. Dinoflagellates (responsible for...