SAVVAS Inv 7 Exp 3 Studying the Human Genome

Scientists are now studying human DNA in labs all over the world. Which options identify current goals for the scientists at these labs? Select all that apply.

• Completing a full sequence of human DNA (the Human Genome Project)

• Identifying the regions of human DNA that are transcribed into RNA

• Identifying the regions of human DNA that bind to proteins

• Analyzing the regions of human DNA that vary among individuals

• Describing the molecular structure of human DNA

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Natural enzymes called (a)   can cut and copy DNA at specific sites. Then the DNA fragments can be separated by the process of (b)   .

• restriction enzymes; gel electrophoresis

• genomic enzymes; genomic imprinting

• DNA replicase; DNA replication

• RNA transcriptase; RNA transcription

A student is developing a flow model to show what steps scientists undergo in order to read DNA and create a full-length map of a DNA sequence. What should be the correct order of steps in the model to show this process?

• Shotgun sequencing → read DNA → cut DNA → separate DNA

• Cut DNA → separate DNA → read DNA → shotgun sequencing

• Separate DNA → shotgun sequencing → read DNA → cut DNA

• Read DNA → cut DNA → shotgun sequencing → separate DNA

A scientist identifies a sequence at random from the human genome. Which description of the sequence is the most likely?

• The sequence is part of a gene for nucleic acid metabolism.

• The sequence is part of a gene for cell growth and development.

• The sequence is part of a gene for immunity and defense.

• The function of the sequence is unknown or unidentified.

Certain disorders cause one copy of a gene in an individual, either from their mother or father, to be expressed, while the other copy is silenced. What is this an example of?

• DNA deletion, where defective chromosomes are deleted from the DNA sequence entirely

• Genomic imprinting, where epigenetic marks attach to histone proteins and DNA, impacting gene expression

• Restriction enzymes, where enzymes alter the chromatic structure of DNA, impacting gene expression

• Altered gene expression, where defective chromosomes are inherited from the mother only