Multiple choice 1.) An Action potential A. is essential for nerve impulse propagation B. involves the influx of negative ions to depolarize the membrane C. involves the outflux of negative lons to depolarize the membrane D. Involves the outflux of positive ions to depolarize the membrane 2.) Which function can be carried out by DNA replication proteins? A. Topoisomerases wind the DNA into a double-helix. B. DNA ligase can initiate new DNA chains C. SSB converts double-stranded DNA into single-stranded DNA. D. Helicases break hydrogen bonds in the DNA. 3.) Which mechanism contributes to accuracy during DNA replication? A. The mismatch repair system recognizes an incorrect base-pair and corrects the mistake in the non-methylated strand. B. Using primers increases accuracy because the first nucleotides in a new nucleic acid chain are more likely to be correct. C. All DNA polymerases have a 5'-3' exonuclease activity which can remove incorrect nucleotides during replication. D. Base-stacking between nucleotides and the template DNA controls insertion of the correct nucleotide.
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps