Exam 9: What Genes Are

A pig's pancreas is still not ready for transplant into a human even after inactivating all of the 62 porcine endogenous retrovirus (PERV)genes in a pig embryo.The pig's ________ system genes would need to be manipulated to help prevent organ rejection by the human.

Viral DNA that has entered the pig genome and remains active is passed from generation to generation through

After the CRISPR-Cas9 system cuts a segment of DNA,the cell's DNA repair process actually removes the DNA sequences between the cut sites.This repair process is most likely facilitated by BOTH ________.

In the first step of the polymerase chain reaction (PCR),the two strands of the DNA being amplified must be separated by exposing the DNA to high ________.

The enzyme that copies DNA is called ________.

Damaged DNA may be repaired by a special class of

If a segment of double-stranded DNA has 20 percent adenine (A),how much of it is cytosine (C)?

The CRISPR-Cas9 system is used to generate a ________ mutation when most of the pol gene is "knocked out" and any remnants of the pol gene are nonfunctional.

Describe the building blocks of DNA and how they are bonded together to form the DNA double helix.

When looking at a single-stranded piece of DNA,

A mutation is due to the addition of two bases in a strand of DNA.This is called a(n)________.

Using the figure below,describe how the two guide RNA molecules in the CRISPR-Cas9 system find the target DNA sequence.

The figure below illustrates DNA undergoing replication.The region indicated by the arrow represents a

Researchers used the CRISPR system to make 455 different cuts in the porcine endogenous retrovirus (PERV)pol genes in the pig genome.All of the PERV genes were inactivated in the pig embryos even though only 20 percent of the resulting mutations were larger than nine base pairs.The resulting mutations were successful at knocking out the PERV genes because

If DNA polymerase did not have the ability to proofread,then DNA replication would

The order of the base pairs in a DNA molecule

Nitrous acid is a chemical that can react with DNA and change cytosine to uracil.If a cell is exposed to nitrous acid and some of the cytosine nucleotides in a gene are converted to uracil nucleotides,what should happen when that cell replicates?

Which of the following will NOT generally cause mutations?

DNA replication

The figure below shows a short sequence of DNA.During DNA replication,the piece of DNA depicted in this figure will produce