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devlian [24]
2 years ago
12

Choose the statement that is NOT true.

Biology
1 answer:
leva [86]2 years ago
3 0

Answer: the answer is b

Explanation: i took the quiz

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In your laboratory journal, describe the two tools of molecular biology that are often described as the scissors and glue for ma
MatroZZZ [7]

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.

7 0
3 years ago
Read 2 more answers
Which nutrients do plants need in larger quantities?<br> micronutrients<br> or<br> macronutrients
SCORPION-xisa [38]

Answer:

macronutrients

Explanation:

macronutrients are important for growing plants. the main macronutrients are nitrogen, Potassium, and phosphorus.

6 0
3 years ago
You have finished performing a procedure in the biology lab and now need to dispose of a plastic test tube that contains the sam
klemol [59]

Answer:

in group 5. Organic Wastes

Explanation:

Remember in a chemical lab, in a hospital or in an industry there is always some wastes that need to be treated in an specific  way. There are 19 categories in which the wastes need to be poured in order to be treated. The starch is an organic waste that normally is involve in biological processes. This waste is consider as a non - toxic, in this way can be join with other organic wastes as acetic acid, peroxide, etc.

4 0
2 years ago
When a species changes in response to change in the environment, we call this ______.
Leona [35]

Answer: Adaptation

species adapt to their environment

8 0
3 years ago
ATP is important because it powers our what?<br><br> PLZ HELPP
Leviafan [203]

Answer:

ATP stands for adenosine triphosphate. It is a molecule found in the cells of living organisms. It is said to be very important because it transports the energy necessary for all cellular metabolic activities. Without ATP, various metabolic activities in the human body cannot take place.

Explanation:

4 0
3 years ago
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