PBS EOC Review #1

Front

What are restriction enzymes?

Back

Restriction enzymes are proteins that cut DNA at specific sequences, allowing for the creation of recombinant DNA and analysis of genetic material.

Front

What does it mean for a trait to be recessive?

Back

A recessive trait is one that only manifests in an individual if two copies of the recessive allele are present, meaning both parents must carry at least one recessive allele.

Front

How does height affect the size of blood spatter?

Back

As the height from which blood falls increases, the diameter of the blood spatter also increases, resulting in larger blood droplets.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a biological mechanism that counteracts a change in a system, helping to maintain homeostasis, such as regulating blood sugar levels.

Front

Why can't blood type be used to identify a single suspect?

Back

Blood type is not unique to individuals; many people can share the same blood type, making it insufficient for identifying a single suspect.

Front

What are the main functions of DNA polymerases?

Back

DNA polymerases are enzymes that synthesize new DNA strands by adding nucleotides to a growing DNA chain during DNA replication.

Front

What is the role of ligases in DNA manipulation?

Back

Ligases are enzymes that join two DNA fragments together by forming phosphodiester bonds, crucial for DNA repair and recombinant DNA technology.

Front

What is RFLP analysis?

Back

Restriction Fragment Length Polymorphism (RFLP) analysis is a technique used to compare DNA samples by cutting them with restriction enzymes and analyzing the resulting fragment lengths.

Front

What is the significance of genetic mutations?

Back

Genetic mutations can lead to variations in traits, some of which may cause diseases, while others may provide advantages in certain environments.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.