Written by Prerak Juthani (PEACE Advisor)   The inside of a cation specific channel (a channel that only lets cations through) is likely to be coated with what group of amino acids? a)    Those that can participate in secondary structure. b)   Those that have acidic properties c)    Those that have basic properties d)   Those that...

Written by Prerak Juthani (PEACE Advisor)  Gap junctions are made of 2 connexons and EACH connexon is made up of 6 separate polypeptides. What level of structure does the connexon protein show? a) primary b) secondary c) tertiary d) quaternary e) none of the above.  Click “Read More” to see the answer.  credit: wikipedia The...

Written by Prerak Juthani (PEACE Advisor)  What is the one commonality among lipids? a)    They all are made of fatty acids and glycerol. b)   They include four rings. c)     They all share a distaste for water. d)   They are made of a hydrophilic region and a hydrophobic region.  Click “Read More” to see the...

Written by Prerak Juthani (PEACE Advisor) Based on the picture above: Why is ribose less stable than deoxyribose? a)    The extra hydroxyl on the ribose allows it to hydrogen bond with many more molecules, which would  decrease the stability of the macromolecule. b)   The extra hydroxyl would cause the ribose to be in the linear...

Written by Prerak Juthani (PEACE Advisor)  The structure of ATP is shown above. Based on the structure, what macromolecular do you think that ATP would be a precursor for which macromolecule? a) protein b) DNA c) RNA d) lipids e) glycogen Click “Read More” to see the answer.  The answer is C. If we remember,...

Written by Prerak Juthani (PEACE Advisor)  A disaccharide can be made by joining any of the following EXCEPT: a) fructose and glucose b) ribose and galactose c) deoxyribose and glucose d) glucose and sucrose e) fructose and fructose Click “Read More” to see the answer.  The correct answer is D. There are very few things...

Published by Prerak Juthani (PEACE Advisor)  According to the fluid mosaic model of membrane structure, integral membrane proteins are primarily (Doudna 2010): a) confined strictly to the hydrophobic later of the membrane. b) positioned in a continuous layer across the entire inner and outer membrane      c) Randomly oriented in the membrane with no...

Written by Prerak Juthani (PEACE Advisor)  Assume that each of the sequences represents one strand from a double stranded genome of a random organism. Which organism, based on the genome below, would be able to survive in the hottest environment? a) 5’ACGTACGTACGTACGTT3’ b) 5’GGGCCCTTTAAACGGG3’ c) 5’CCCCCCCCCCCCCUUCC3’ d) 5’ATATATATATATATAT3’ e) none of the above. UV...

Written by Prerak Juthani (PEACE Advisor)  Ampicillin is a drug that is very commonly given to get rid of bacterial infections. What structure do you think it targets? a) Cell wall b) Plasma membrane c) Membrane Glycoproteins d) Ribosomes e) None of the abovePress “Read More” to see the answer.  The correct answer is...

Written by Merel Dagher (PEACE Adivsor)  Click “Read More” to see the answer.  The correct answer is a. Both systems involve the hypothalamus, which produces GnRH, which then binds to the anterior pituitary and causes the production of FSH and LH. LH, in spermatozoa production, binds to the Leydig cells and causes the conversion...