PCR and Gel Electrophoresis

In gel electrophoresis, the largest DNA fragment will appear

• closest to the starting wells

• farthest from the starting wells

• three quarters away from the starting wells

• it depends on how many fragments there are

Answer explanation

The largest DNA fragment will appear closest to the starting wells in gel electrophoresis.

This technique used to analyze DNA involves the

• synthesis of new DNA strands from subunits

• separation of DNA fragments based on size

• production of genetically engineered DNA molecules

• removal of defective genes from DNA

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In gel electrophoresis, the smallest DNA fragment will appear

• closest to the starting wells

• farthest from the starting wells

• three quarters away from the starting wells

• it depends on how many fragments there are

To repeatedly copy a molecule such as DNA, usually until there are billions of copies present.

• Amplify

• Base Pairs

• Flanking Sequence

• DNA Fingerprint

Answer explanation

To repeatedly copy a molecule such as DNA, usually until there are billions of copies present. This process is called amplification.

Lab technique used to amplify DNA sequences to produce billions of copies of a fragment of DNA.

• Short Tandem Repeats (STR)

• Polymerase Chain Reaction (PCR)

• DNA Fingerprint

• Flanking Sequence

Answer explanation

Polymerase Chain Reaction (PCR) is a lab technique used to amplify DNA sequences by producing billions of copies of a fragment of DNA. It is the correct choice for this question.

Gel Electrophoresis separates molecules by...

• Shape

• Color

• Size

• Atom

Answer explanation

Gel Electrophoresis separates molecules based on their shape and size.

This laboratory procedure is known as

• CLONING

• gel electrophoresis

• chromatography

• use of a dichotomous key

Answer explanation

The laboratory procedure known as gel electrophoresis is used to separate and analyze DNA fragments based on their size and charge.

In preparation for an electrophoresis procedure, enzymes are added to DNA in order to

• convert the DNA into gel

• cut the DNA into fragments

• change the color of the DNA

• produce longer sections of DNA

Answer explanation

Enzymes are added to DNA to cut it into fragments for electrophoresis, not to convert it into gel, change its color, or produce longer sections of DNA.

Pattern of DNA fragments obtained by examining a person's unique sequence of DNA pairs.

• DNA Fingerprint

• Allele

• Chromosome

Answer explanation

DNA fingerprinting is a technique that analyzes a person's unique sequence of DNA pairs, making it the correct choice.

Are the elephants homozygous or heterozygous for the gene shown from marker C?

• both are heterozygous

• one is heterozygous and one is homozygous

• both are homozygous

Answer explanation

The elephants are heterozygous for the gene shown from marker C because they have 2 bands

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2