23. A medical condition that can be treated by using proteins produced through genetic engineering is

a. depression
b. multiple sclerosis
c. hemophilia
d. all of the above

26. Endosymbiosis best explains the possible evolutionary beginnings of
a. prokaryotes
b. cyanobacteria
c. eukaryotes
d. all of the above
C?

17. During transcription, the genetic information for making a protein is "rewritten" as a molecule of
a. messenger RNA
b. ribosomal RNA
c. transfer RNA
d. translation RNA
D?

18. When genetically engineering an organism, a plasmid
a. is the main chromosome of the bacteria that is cloned
b. is cut with a restriction enzyme to accept the gene of interest
c. helps screen for cells that didn't take up the gene of interest
d. combines with the gene of interest to make a replicating chromosome
A?

Thanks
-MC

This is unacceptable. Keystone students may not use answer sites for tests. The Lesson 2 biology test should be completed exclusively based on the book. Anyone could answer this question, and anyone could get it wrong. Please do not use any sites like this again.

23. The correct answer is c. hemophilia. Hemophilia is a genetically inherited disorder that affects blood clotting. It can be treated by using proteins produced through genetic engineering. To arrive at this answer, one would need to have knowledge about different medical conditions and the potential treatments available for them.

26. The correct answer is c. eukaryotes. Endosymbiosis is the theory that explains how eukaryotic cells evolved from prokaryotic cells. According to this theory, certain organelles within eukaryotic cells, such as mitochondria and chloroplasts, were originally free-living prokaryotic organisms that were engulfed by another cell and formed a symbiotic relationship. To answer this question, one would need to have an understanding of the concept of endosymbiosis and its connection to the evolution of different organisms.

17. The correct answer is a. messenger RNA. During transcription, the genetic information from DNA is transcribed into a molecule called messenger RNA (mRNA), which carries the instructions for making a specific protein. This mRNA molecule then undergoes translation to synthesize the corresponding protein. To answer this question, one would need to be familiar with the process of transcription and the different types of RNA involved.

18. The correct answer is b. is cut with a restriction enzyme to accept the gene of interest. When genetically engineering an organism, a plasmid, which is a small, circular DNA molecule, is commonly used as a vector to introduce a gene of interest into the target organism. To do this, the plasmid is cut with a restriction enzyme, which creates a specific insertion site, or "acceptor", for the gene of interest. The cut plasmid can then be further manipulated to insert the desired gene. To answer this question, one would need knowledge of genetic engineering techniques and the role of plasmids in this process.

Hope this helps clarify your understanding!