Written by Prerak Juthani (PEACE Advisor)  You’re running a PCR and you ordered your primers from a newly developed biotech company. You then add in the taq polymerase and the various nucleotides needed for the reaction. However, at the end, you don’t get any amplification. What is a potential reason? a) The polymerase denatures....

Written by Prerak Juthani (PEACE Advisor)  Which of the following is the strongest aspect of tertiary structure? a) hydrogen bonds in the backbone of the proteins. b) hydrogen bonds among the R groups of the amino acids. c) disulfide bonds d) hydrophobic interactions e) van der waals interactionsClick “Read More” to see the answer. ...

Written by Prerak Juthani (PEACE Advisor)  When NAD+ undergoes a reaction to form NADH, the NAD+ molecule is ______, and it _____  ____ electron(s). a)     Reduced, loses, 2 b)    Reduced, gains, 2 c)     Reduced, gains, 1 d)    Oxidized, loses, 2 e)     Oxidized, gains, 2Click “read more” to see the answer.  The correct answer is...

Written by Prerak Juthani (PEACE Advisor)  The free energy change for the decomposition of sugar is actually very negative. How come we don’t see sugar breaking down in before our eyes? a)     The sugar decomposition is non-spontaneous.   b)    The sugar decomposition occurs, but it needs a catalyst, and since there is no catalyst, the...

Written by Prerak Juthani (PEACE Advisor)  Why does the hydrolysis of ATP produce energy?  a)     Because the molecule is degraded into its constituent elements, and this process releases energy. b)    High energy phosphate bond is cleaved – which releases energy. c)     By releasing one phosphate group, you decrease the negative/negative interactions, which stabilizes the...

Written by Prerak Juthani (PEACE Advisor)  Animal cells like to be in __________ environments, and plant cells like to be in _____ environments. a) isotonic, isotonic b) isotonic, hypotonic c) isotonic, hypertonic d) hypotonic, isotonic e) hypertonic, isotonic  Click “Read More” to see the answer.  The answer is B.  Remember the fundamental rule: water...

Written by Prerak Juthani (PEACE Advisor)  Hemoglobin is a _____. It has four subunits, which applies to its _____ level of structure.  Each subunit has heme, which is a _____ _____. a) protein; quaternary; prosthetic group b) enzyme; quaternary; prosthetic group c) protein; quaternary; cofactor d) protein; tertiary; prosthetic group e) enzyme; quaternary; coenzyme ...

Written by Prerak Juthani  The Na/K pumps: ___ K+ ions to the ___ of the cell and ___ Na+ ions to the ___ of the cell. a) 3, inside, 2 outside b) 2 inside, 2 outside c) 2, inside, 3, outside d) 3 outside, 2, inside           e) 2, outside, 3, inside Click “Read More”...

Written by Prerak Juthani (PEACE Advisor)  What organelle do expect to be really large in the liver cells? a) nucleus b) lysosome c) mitochondria d) smooth ER e) rough ER Click “Read More” to see the answer.  The correct answer is D. This question involves knowing the true functions of the various organelles that tend...

Written by Prerak Juthani (PEACE Advisor)  Click “Read More” to see the answer.  Which of the following is not considered to be a part of the endomembrane system? a)    golgi apparatus b)   Smooth ER c)    Rough ER d)   Vesicles e)    Mitochondria   The correct answer is E. The name “Endomembrane System” can be slightly deceiving...