Question

pcr allows scientists to...

a turn rna into proteins in the pcr machine
b create genetically modified organisms in the pcr machine
c use tiny amounts of dna for many purposes
d destroy unwanted dna

question 51
dna fingerprinting (\dna testing\) can be used to... select all that apply

a determine ancestry
b identify the father of a child
c clone organisms
d solve crimes
e change gene sequences

question 52
genetic engineering allows scientists to...

a increase chromosome numbers
b measure mutation rates
c separate chromosomes
d modify dna in organisms

Explanation:

First Question (PCR):

• Option a: PCR does not convert RNA to proteins; translation (not PCR) does that.
• Option b: PCR amplifies DNA, not create GMOs in the machine.
• Option c: PCR (Polymerase Chain Reaction) amplifies small amounts of DNA, allowing its use for various purposes (e.g., testing, research).
• Option d: PCR amplifies DNA, not destroy it.

• Option a: DNA fingerprinting can analyze genetic markers to determine ancestry.
• Option b: It can compare DNA of child and potential father to identify paternity.
• Option c: DNA fingerprinting is for identification/analysis, not cloning organisms.
• Option d: Crime-solving uses DNA fingerprinting to match suspects to crime scene DNA.
• Option e: DNA fingerprinting does not change gene sequences (that’s genetic engineering).

• Option a: Genetic engineering does not focus on increasing chromosome numbers.
• Option b: It is not for measuring mutation rates (that’s more about genetic analysis).
• Option c: Separating chromosomes is not the goal of genetic engineering.
• Option d: Genetic engineering involves modifying an organism’s DNA (e.g., adding/removing genes).

Answer:

c. use tiny amounts of DNA for many purposes

Question 51 (DNA Fingerprinting):