A peptide with 200 amino acids contains

You discover alien life with a genetic system based on a DNA-like molecule, but it has 6 bases instead of 4 as happens on Earth. The proteins on the planet are built from combinations of 30 possible amino acids. What would be the minimum number of bases in each codon on this planet?

Here is the genetic code table once more: 

The optimal interatomic distance for strong Van der Waals interactions between atoms of two molecules is about:

Using the arrow designations, identify the C-terminus in the structure below.

A tRNA has an anticodon with the sequence 3′-UAC-5′. What would be the sequence of the complementary codon?  

The ratio of a plasmid is 0.8. Find the % composition in nucleotides, explaining each step of the process in detail.  Make sure to explain your reasoning. If you need to include mathematical equations in your answer, please consider using the ‘Insert’ > ‘Equation’ menu for higher readability.

In a right-handed double helix, if one looks down the central axis of the molecule, _________.

What level of structure in proteins is held together by R group interactions between different polypeptides?

The site on DNA to which RNA polymerase binds before initiating transcription is called the ______.