DNA and Gel Electrophoresis

This laboratory procedure is known as

• CLONING

• gel electrophoresis

• chromatography

• use of a dichotomous key

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

The parents of a new baby believe they brought the wrong child home from the hospital. Gel electrophoresis was performed using DNA samples from the parents and the child. A section of the gel

electrophoresis results is shown below. Which conclusion is valid based on the gel electrophoresis results?

• They have the correct child, because her genetic information is identical to that of the father.

  
  

• They have the wrong child, because her genetic information does not match that of either parent.

• They have the correct child, because her genetic information came from both parents.

  
  

• They have the wrong child, because her genetic information matches only that of the mother.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A student performed a gel electrophoresis experiment. The results are represented in the diagram

below. Compared to the fragments at the top of the gel, the fragments at the lower end are

• larger, and move slower

• larger, and move faster

• smaller, and move faster

• smaller, and move slower

Which chemicals are used to cut DNA into fragments for a gel electrophoresis procedure?

• enzymes

• molecular bases

• hormones

• ATP molecules

Restriction Enzymes are . . . 

• proteins
• DNA
• fats
• carbohydrates

Restriction Enzymes . . . 

• cut DNA at precise locations
• help bacteria to pick up DNA
• move DNA through a gel
• copy DNA

Restriction Enzymes come from . . . 

• viruses
• bacteria
• goats
• spiders

Why do bacteria have restriction enzymes?

• To prevent being infected by viruses
• To help DNA get into the cell
• To be able to grow in an incubator
• They don't - viruses have restriction enzymes

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1