1. Which choice CORRECTLY lists the molecular masses from smallest to largest? S
ID: 537213 • Letter: 1
Question
1.
Which choice CORRECTLY lists the molecular masses from smallest to largest?
Select one:
A. 1.8 mDa < 15,000 Da < 15,100 amu <18 kDa < 1.8 MDa
B. 18 kDa < 15,000 Da < 15,100 amu < 1.8 MDa < 1.8 mDa
C. 1.8 MDa < 15,000 Da < 15,100 amu <18 kDa < 1.8 mDa
D. 1.8 MDa < 18 kDa < 15,100 amu < 1.8 mDa <15,000 Da
E. 1.8 mDa < 15,100 amu < 15,000 Da <18 kDa < 1.8 MDa
2.
When energy is used by a system, can it be “used up”? Select one:
A. Yes, it is used up when all energy is converted into chemical energy.
B. No, all energy is converted into kinetic energy.
C. No, all energy is converted into potential energy.
D. No, energy can be converted into kinetic and potential energy.
E. Yes, it is used up when the energy source is depleted.
3.
Which present-day observable piece of evidence supports the “RNA world” hypothesis?
Select one:
A. RNA molecules participate in biologically significant reactions.
B. RNA nucleotides catalyze peptide bond formation.
C. RNA can serve as an information-carrying molecule.
D. RNA molecules participate in biologically significant reactions, and RNA nucleotides catalyze peptide bond formation.
E. RNA molecules participate in biologically significant reactions, RNA can serve as an information-carrying molecule, and RNA nucleotides catalyze peptide bond formation.
Explanation / Answer
Ans 1. a. 1.8 mDa < 15,000 Da< 15,100 amu < 18kDa < 1.8 MDa
1 dalton = 1.0013 amu
So that means dalton is slightly larger than amu.
15000 Da = 15002 amu
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