Biotechnology and the Human Genome

REVIEW

CHAPTER 13 + 14a

Which enzyme?

• Is used in PCR to join nucleotides (not separate like it states on the study sheet) to make a strand of DNA?

• PCR animation

• ANSWER: Taq polymerase

Where was Taq polymerase discovered?

• A. Jamaica

• B. Hot Springs

• C. Antarctica

• D. Atlantic Ocean

• ANSWER: B Hot Springs

Which enzyme is used to cut DNA?

• Ligase

• Restriction

• TAQ

• Ti

• ANSWER: restriction

Which enzyme is used to paste sticky ends (bind plasmid to DNA

fragment)?• Ligase

• Restriction

• TAQ

• Ti

• ANSWER: ligase

Where is the plasmid?

A

B D

A B

C D

What carries genes that destroys antibiotics;

• Also used as a vector for genetic engineering?

• ANSWER: R plasmid

What is an organism that has genes inserted in it from another organism?

• ANSWER: transgenic

What is an organism (or plasmid) that carries an organism (or genes)

into another organism?

• ANSWER: vector

What is a plasmid from Agrobacterium tumefaciens to give

genetic material to plants?

• ANSWER: Ti plasmid

What matches this “sticky end?”• A G T A C G T A A• G C A T T• AGTA• TCAT• Answer: TCAT

PCR is useful to do what?

•ANSWER: make large copies from a small amount of DNA

Who Invented the PCR?

• ANSWER: Kary Mullis

How does the number of DNA change with each cycle in the PCR?

• ANSWER: Doubles

What does a gel electrophoresis do?

• ANSWER: separates the DNA fragments according to size

Which DNA fragments are the longest?

• ANSWER: the ones at the top (near wells)

What two things determine where the strands will be on the gel?

• ANSWER: size of the fragments + charge

• (DNA is negative and will move toward the positive electrode)

Gel Electrophoresis Animation

• Click on the pictureClick Here

In a gel electrophoresis, what direction do the DNA

fragments move?

ANSWER:negative to positive

• Acidic to basic• Positive to negative• Basic to acidic• Negative to positive

Fill in the blanks for the DNA fragments in a gel electrophoresis:

A ________ DNA segment will travel less far

A _______DNA segment will travel farther

• A. shorter longer

• B. shorter longer

(see next slide for answer)

What are jumping genes?

• ANSWER: also called transposons• are sequences of DNA that can move

around to different positions within the genome of a single cell Animation Quiz 5 - Transposons: Shifting Segments of the Genome

Who discovered jumping genes?

• ANSWER: Barbara McClintock

Where would telomeres be found?

• ANSWER: a region of repetitive DNA at the end of a chromosome, which protects the end of the chromosome from deterioration.

What are RFLP’s?

• ANSWER: Restriction Fragment Length Polymorphism

• Cut by restriction enzymes

• Rflp animation

What is biotechnology?

• ANSWER: use of living organisms or their products to modify human health and the human environment.

What is the number?

• Year Human Genome Project began?

• ANSWER: 1990

What is the number?

• Year Human Genome Project was completed?

• ANSWER: 2003

What number?

• Number of genes (working genes) that actually code for proteins in the human genome?

• ANSWER: 20,000 – 25,000

What is the number?

• Estimated number of genes in E. coli bacterial cell?

• ANSWER: 2000

What is the number?

• Percentage of nucleotide bases alike in all humans?

• ANSWER: 99.9%

What is the number?

• Percentage of DNA in a human cell thought to be non-coding (junk DNA)?

• ANSWER: 98% (was thought to be 97%)

What is the number?

• Of nucleotide pairs (or base pairs) in a haploid set of chromosomes?

• ANSWER: 3 billion

Match the GM PRODUCTS:

• A. Flavr Savr

• B. Golden Rice

• C. Roundup Ready

• D. Bt Cotton

• 1. given a gene increases skin toughness

• 2. gene isolated from soil bacterium to kill certain insects (corn and cotton borers)

• 3. vitamin-A producing gene added

• 4. gene put into soybeans to control weeds due to its glyphosate

• ANSWER: 1-A, 2-D, 3-B, 4-C

VNTR’s1. Who’s child of Mom and Dad

2. Who is not?

How do you read a DNA fingerprint?

How are the DNA fingerprints made? (Put in order)

• ____Paper blot to transfer DNA bars to paper or photograph

• ____Pipette DNA in Gel wells• ____Connect to voltage supply • ____Cut DNA segment with restriction enzymes• _____Rinse blot with probes to make

autoradiograph

• Answer: 4, 2, 3, 1, 5

Steps of PCR

• A. Extension

• B. Annealing

• C. Denaturing

• 1. heated 94oC to break apart DNA strands

• 2. DNA primers added when cooled 54oC

• 3. heated to 72oC to make the DNA strand copy

• ANSWER: 1-C, 2-B, 3-A

Match the scientists:

• A. McClintock

• B. Venter

• C. Mullis

• 1. discovered transposons (jumping genes)

• 2. Heads Ceelera, an automated genome coder at fast pace

• 3. devised the PCR

• ANSWER: 1-A, 2-B, 3-C

CSI had a small amount of blood from a crime scene. What could be

done to make a bigger sample?

• ANSWER: PCR

What must be done to cause an egg and the udder cell of a sheep to fuse

to form an embryo?

• ANSWER: jolt with electricity

What is this structure called?

•

• ANSWER: recombinant DNA

Alba has genes from a jellyfish.

• What do you call organisms that have genes from other organisms?

• ANSWER: transgenic

What is cloning?

• Clones are organisms that have exact genetic material.

• Identical twins.

• Copies of recombinant DNA

• ALL of the above.• ANSWER: all of the above

What is the name of the first cloned sheep?

• ANSWER: Dolly

• IS SHE STILL ALIVE?No, she died early with adult diseases, like arthritis and lung cancer.

• (typical is 10-12 years)

What process separates DNA fragments?

• PCR• Gel electrophoresis• Recombining DNA• ANSWER: Gel

electrophoresis

What is a Radioactive Probe?

• A: Labeled short strand of DNA

to find a specific gene (like CF gene)

What are four goals of the HGP?

• 1.To determine the sequences of the 3 billion chemical base pairs that make up human DNA.

What are four goals of the HGP?

• 2. identify all the approximately working

25,000 genes in human DNA

What are four goals of the HGP?

•3. To store this information in databases (sex offenders, soldiers).

What are four goals of the HGP?

• 4. To transfer related technologies to the private sector (gene therapy, drugs, vaccines).