1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
r-ruslan [8.4K]
3 years ago
8

In your laboratory journal, describe the two tools of molecular biology that are often described as the scissors and glue for ma

nipulating dna. describe how these tools of molecular biology combined with plasmids can be used to make copies of an important gene.
Biology
2 answers:
MatroZZZ [7]3 years ago
7 0

The "scissors" of the molecular biology are: DNA Restriction enzymes.

A restriction enzyme is a protein capable of cleaving a DNA fragment at a characteristic nucleotide sequence called a restriction site. Each restriction enzyme thus recognizes a specific site. Several hundred restriction enzymes are currently known.

Naturally present in a large number of species of bacteria, these enzymes have become important tools in genetic engineering.


The "glue" of the molecular biology are: DNA ligase

In molecular biology, DNA ligases are ligase-class enzymes that catalyze the formation of a phosphodiester bond between two segments of DNA. DNA ligases are involved in several essential cellular processes of DNA metabolism: in DNA replication, suture of Okazaki fragments, and in DNA repair and homologous recombination.


The use of these tools in molecular biology: Cloning

Molecular cloning is one of the bases of genetic engineering. It consists of inserting a DNA fragment (called insert) in an appropriate vector such as a plasmid for example. The new plasmid thus created will then be introduced into a host cell, generally the Escherichia coli bacterium. This will then be selected and multiplied to obtain a large amount of the plasmid of interest. Cloning a gene involves inserting it into a plasmid. A clone will be the bacterial transformant that contains this particular plasmid. In this case we speak of clone because all the individuals of the bacterial colony are genetically identical. Molecular cloning is thus different from reproductive cloning (creating an individual genetically identical to another but of a different age) or therapeutic cloning (making tissues from stem cells to perform transplants compatible with the recipient).

Molecular cloning requires restriction enzymes capable of cleaving the DNA, and DNA ligase capable of re-gluing the DNA fragments. Ligase was isolated for the first time from T4 bacteriophage. This enzyme is involved in the repair and replication of DNA. It can bind DNA fragments with compatible sticky ends. At higher concentration, this enzyme is also able to bind two ends of DNA as shown here. T4 DNA ligase works using ATP and Mg ++. It has an activity optimum of 16 ° C, but remains active at room temperature.

Aleksandr [31]3 years ago
7 0

The term scissors is used in molecular biology for an enzyme which is known as DNA restriction enzyme. The term glue is used in molecular biology for an enzyme which is known as DNA ligase. These enzymes are used for cutting and sticking the DNA during recombinant DNA technology.

Further Explanation:

Restrictionenzymes commonly known as the scissors in the molecular biology are the enzymes that are used to cut the DNA into smaller parts for cut the DNA from a target sequence. There are enzymes that act as molecular scissors and cut the DNA with overhanging strands. These strands are known as sticky ends. There are also the enzymes that cut the DNA with blunt ends and these ads are known as blunt ends. Restriction enzymes predominantly used in a molecular biology or recombinant DNA technology lab. EcoR1 is the most common example of a restriction enzyme.

DNA ligase commonly known as the molecular glue is used to stick the strands of DNA that are cut by the help of restriction enzymes. A single piece of DNA is formed by sealing the gap between the molecules which is only possible with the help of DNAligase.

Both these enzymes are widely used in the recombinant DNA technology laboratory for the cutting of specific part of DNA and the insertion of intended genes into the plasmid during DNA cloning.

Learn more:

1. Learn more aboutstructural component is found in DNA: brainly.com/question/334927

2. Learn more about DNA: brainly.com/question/2416343

3. Cell cycle and DNA replication: brainly.com/question/1600165

Answer Details:

Grade: High School

Subject: Biology

Chapter: Molecular Biology

Keywords:

Molecular scissors, molecular glue, restriction enzyme, DNA ligase, DNA strand, plasmid, DNA cloning, recognition sites, sticky ends, blunt ends.

You might be interested in
What’s the difference between a standing defense and an induced defense?
gizmo_the_mogwai [7]

The correct answer is: 4) Standing defenses are always present; induced defenses develop in response to a threat

Induced defense is defense that can be changed or invoked when needed. Induced defenses are slow to happen. When invoked, induced defense requires energy but otherwise doesn’t.

Standing defense is always there. It is use, for example when predation is a constant threat.

3 0
3 years ago
Im giving 50 points please give correct answers. Research the industrial revolutions in the 1800s. the evaluate the following cl
Aliun [14]

Answer:

"The most significant effect of population growth in Europe from 1700 to 1800 was urbanization and the creation of large cities which was marked by poverty, crime, and poor sanitation.” Historians have identified several causes for the Industrial Revolution, including: the emergence of capitalism, European imperialism, efforts to mine coal, and the effects of the Agricultural Revolution. Capitalism was a central component necessary for the rise of industrialization.

6 0
2 years ago
How might the fatty deposit and the arterial wall affect the nervous system ?
emmasim [6.3K]
It put stress on the nervous system.
4 0
3 years ago
Put the stages of cell cycle in order help
Jlenok [28]
The order is : interphase, prophase, metaphase, anaphase, telophase & cytokinesis.
5 0
3 years ago
What would happen if you kept accelerating?
Vadim26 [7]
1. You would go faster.
2. You would eventually hit terminal velocity.
3. No longer accelerating.

#2 Depends on the weight and surface area (wind resistance)of the object

Acceleration - a change in velocity
8 0
3 years ago
Other questions:
  • What could be a result of eutrophication of nitrogen?
    11·1 answer
  • PLEASE HELP ASAP!! CORRECT ANSWERS ONLY PLEASE!!!
    13·1 answer
  • Read the passage below about acupuncture. Acupuncture is an alternative medicine that uses wire-thin needles inserted by a train
    5·2 answers
  • Help me!!!!!!!!!!!!!!!!!!!!!!!!
    11·1 answer
  • Complete the following statement using the choices below. Air moves out of the lungs when the pressure inside the lungs is _____
    14·1 answer
  • What is the structure that allows euglena and paramecium to move? please help will try to give brainliest.
    9·1 answer
  • Please help in biology.
    9·1 answer
  • What do we know about the surface of Mercury?
    7·1 answer
  • PLEASE HELP I HAVE AN EXAM !!!
    10·1 answer
  • Need help please
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!