Posts Tagged ‘help’
Last Updated on Thursday, 9 June 2011 08:30 Written by Administrator Thursday, 9 June 2011 08:30
Question by Mickey Mouse: Can you help me with my Biology homework please and thank-you Multiple choice?
1. Selective breeding produces huskies strong enough to pull sleds.
T True
F False
2. Genetic engineering inserts a bioluminescent gene into a tobacco plant.
T True
F False
3. Gel electrophoresis produces a plant that is disease-resistant like one parent and more nutritious like the second parent.
T True
F False
4. Recombinant DNA technology combines a DNA fragment with DNA from a different source.
T True
F False
5. Hybridization produces large numbers of identical DNA molecules.
T True
F False
6. Gel electrophoresis separates DNA fragments by size.
T True
F False
7. A test cross can help a gardener determine that a rose plant has a
A genotype rr.
B genotype Rr.
C phenotype rr.
D phenotype Rr.
8. Which do scientists use to cut genomic DNA into smaller fragments to isolate specific genes?
A DNA ligase
B recombinant DNA
C restriction enzymes
D transgenic bacteria
9. How many genes make up human DNA?
A 5000 to 10,000
B 20,000 to 25,000
C 45,000 to 50,000
D 70,000 to 75,000
10. Which is an example of selective breeding?
A breeding tomatoes to increase fruit size
B crossing two plants with desirable traits
C inserting genes from one plant into another
D returning bred plants to their natural habitat
11. Which is a disadvantage of hybridization?
A Hybridization is harmful to the affected organisms.
B Hybridization is technically difficult to perform.
C Hybridization is inferior to genetic engineering.
D Hybridization is time-consuming and expensive.
12. Which is the process by which unwanted aggressive behaviors are bred out of certain types of dogs?
A hybridization
B inbreeding
C selective breeding
D test crosses
13. Which process is applied to identify mutations or errors in DNA molecules?
A DNA sequencing
B gel electrophoresis
C polymerase chain reaction
D recombinant DNA technology
14. Which process separates DNA fragments by size?
A DNA sequencing
B gel electrophoresis
C polymerase chain reaction
D recombinant DNA technology
15. The primary goal of the HapMap project is to
A catalog the genetic sequences of individual DNA.
B create a database for genetic, biological information.
C identify genes that cause serious human diseases.
D map the sequence of nucleotides in human DNA.
Best answer:
Add your own answer in the comments!
Last Updated on Tuesday, 7 June 2011 08:32 Written by Administrator Tuesday, 7 June 2011 08:32
Question by laura: How does a thermal cycler help the process of PCR?
Best answer:
Answer by Roberto
It uses a Peltier block to heat and chill the tubes very rapidly. It does it over and over again through the PCR, that’s why it’s called thermal cycler (thermal = heats and chills, cycler = over and over).
Give your answer to this question below!
Tags: CYCLER., help, process, thermal | Posted under PCR Polymerase Chain Reaction Forum - Troubleshooting Questions & Answers | Comments Off
Last Updated on Monday, 6 June 2011 12:40 Written by Administrator Monday, 6 June 2011 12:40
Question by Alicia Allard: I need Bio help quick!!!!!!!!!!!!!!?
Polymerase chain reaction (PCR):
A. is a relatively simple and is a fast way of copying very small amounts of DNA
B. was developed during the 1980s
C. resulted in its discoverer sharing a Nobel Prize
D. all of these
Vectors are:
A. enzymes that cut DNA at specific sequences
B. DNA molecules used to carry foreign DNA fragments into bacteria or other cells
C. RNA molecules that can be joined with DNA fragments that are to be cloned
D. large eukaryotic chromosomes
Restriction enzymes:
A. weld together fragments of DNA
B. attach to DNA molecules at specific sites and cut both strands of DNA at that place
C. only cut RNA molecules at specific sites and cut both strands of DNA at that place
D. are chemical machines that make parts of the cell membrane
The current estimate of the number of genes in the human genome is:
A. 1000
B. 24,000
C. 100,000
D. 50,000
Currently, there are no known risks in genetically modifying crop species.
True
False
Self-replicating DNA fragments found in bacterial cells are called:
A. alleles
B. anthers
C. bacteriophages
D. plasmids
Advances in biotechnology have made it possible for scientists to synthesize human insulin.
True
False
One technique used to separate DNA fragments of different lengths is:
A. gel electrophoresis
B. gene pharming
C. polymerase chain reaction
D. selective breeding
DNA ligase:
A. links together the “sticky ends” of cut DNA segments
B. attaches to DNA molecules at specific sites and cut both strands of DNA at that place
C. only cuts RNA molecules at specific sites and cuts both strands of DNA at that place
D. is a chemical machine that makes parts of the cell membrane
THANKS!
Best answer:
Give your answer to this question below!
Tags: help, need, Quick | Posted under PCR Polymerase Chain Reaction Forum - Troubleshooting Questions & Answers | Comments Off
Last Updated on Saturday, 4 June 2011 12:32 Written by Administrator Saturday, 4 June 2011 12:32
Question by Anita: Can someone please help me with biology? Best/fastest answer gets 10pts!!?
_____________________ is the direct manipulation of genetic material
a.gene splicing
b.gene insertion
c.genetic engineering
d.cloning
42.Ligase is an enzyme that____________________
a.breaks down catalase
b.Glues proteins back together
c.Breaks apart DNA for replication
d.glues DNA particles together
43.An example of evidence used for a forensic investigation is __________
A.hair fibers
B.DNA
C.Saliva
D.Anything in the body
44.PCR in an PCR analysis stands for
a.polyer chain reactants
b.polychannel reaction
c.polymerase channel restoration
d.polymerase chain reaction
45.During the Genetic Engineering process DNA is cut using______________
a.restriction enzymes
b.ligose
c.PCR
d.Catalase
Thanks in advance!!
Best answer:
Answer by Da2Shae
41.A
42.D
43.D
44.D
45.A
Easy!
What do you think? Answer below!
Tags: 10pts, answer, Best/fastest, Biology, gets, help, Please, someone | Posted under PCR Polymerase Chain Reaction Forum - Troubleshooting Questions & Answers | Comments Off