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
The Meselson-Stahl experiment provided the first experimental evidence that: A. Newly synthesized DNA in E. coli has different n
Ksju [112]

Answer:

the answer is a

Explan:

4 0
2 years ago
What would happen if there was no condensation stage in the water cycle
Irina18 [472]
The condensation stage is where water turns into vapor which forms into clouds and if we don't have condensation we won't have clouds and we won't have participation (rain). <span />
7 0
3 years ago
Read 2 more answers
How does waste move from kidneys to the bladder in the human excretory system?
Salsk061 [2.6K]

The kidneys filter the blood to remove wastes and produce urine. The ureters, urinary bladder, and urethra together form the urinary tract, which acts as a plumbing system to drain urine from the kidneys, store it, and then release it during urination.

6 0
2 years ago
A possible reaction for the degradation of the pesticide DDT to a less harmful compound was simulated in the laboratory. The rea
Bas_tet [7]

Answer:

This exercise is incomplete, missing the value of k (decay constant), which is equal to 4x10⁻⁸s⁻¹ at 25°C

The answer is 0.549 years

Explanation:

Given:

first order of reaction

k = 4x10⁻⁸s⁻¹

For a first order of reaction, the half-life time for the degradation of DDT is equal to:

t=\frac{0.693}{k} =\frac{0.693}{4x10^{-8} } =17325000s=0.549years

8 0
3 years ago
2) For many years, it was believed that the Earth was flat, that the Earth was the center of the universe, and that the fire and
STALIN [3.7K]
The answer is D. because cause a climate change which put a hole in the ozone layer  which cause heat radiation 
8 0
2 years ago
Other questions:
  • Which of these is an example that scientific knowledge can be reviewed
    5·1 answer
  • Most atoms contain one or more
    10·2 answers
  • A student in a biology class crossed a male Drosophila melanogaster having a gray body and long wings with a female D. melanogas
    13·2 answers
  • Scientists use experiments and observations to make logical conclusions about scientific inquiries. This process is called the _
    10·2 answers
  • Which actions are involved in the immune response?
    9·2 answers
  • How does tobacco smoke affect your body​
    5·2 answers
  • True or False: Homologous structures are structures that are different in related organisms because they were inherited from a c
    11·1 answer
  • Which structure can be found in a eukaryotic cell but NOT in a prokaryotic cell?
    15·1 answer
  • Ok I have three questions I really need help with!!
    11·1 answer
  • The united nations defines a megacity as having at least how many inhabitants?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!