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Darya [45]
2 years ago
9

It’s easy to understand why multiple bands would be present in the lanes containing DNA that has been cut with restriction enzym

es, but why do you think there are several bands present in the lanes containing undigested (uncut) pGLO DNA? What do these bands represent?
Biology
1 answer:
bulgar [2K]2 years ago
8 0

Answer:

These bands represent different confirmation of DNA

Explanation:

pGLO DNA is a plasmid DNA that is used as a vector for genetic engineering. Plasmid DNA is found in supercoiled confirmation in vivo. The double helix forms extra twists to easily fit inside the cells. During isolation of plasmid from the cell, nicks can be introduced in the DNA due to harsh isolating methods or contamination by nuclease. As a result the supercoiled confirmation is changed into circular confirmation. It is bulkier than the supercoiled form and travels more slowly. When both DNA stands get cut at the same place, the DNA gets liner confirmation. In the end, supercoiled DNA runs the fastest on gel followed by linear DNA and then the circular DNA.

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8(b)(i). Diagram 8.2 shows part of the Periodic Table. State the type of<br>element for P. *<br>​
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Answer:

<u><em>Phosphorus</em></u>

Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.

Explanation:

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During telophase of Mitosis nuclear membranes of two separated nuclei are formed around each set of chromosomes.  

<u>Explanation</u>:  

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4 0
2 years ago
A genomic sequencing method called _______ sequencing was used in the human genome project. In this method, DNA is broken into m
Dominik [7]

1. shotgun

2. inbreeding

3. cloning

4. Y chromosomes

5. The Human Genome Project sought to map a human's entire genome.

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6 0
2 years ago
What are the differences in their hard parts, distribution, reproduction among phytoplankton of cyanobacteria, diatom, coccolith
Margarita [4]

Answer:

Explanation:

DIFFERENCES BETWEEN HARD BODY PARTS.

•Cyanobacteria have calcified sheaths.

• Diatoms have hard but porous cell wall.

• Coccolithophores have hard body parts.

• Silicoflagellates skeleton is composed of opaline silica.

• Dinoflagellates do not have hard body parts

• Green algae - no hard body parts.

• Brown algae - no hard body parts.

DIFFERENCES BETWEEN DISTRIBUTION

• Cyanobacteria are found almost in every terrestrial habitat on planet.

• Diatoms are found in oceans, freshwater, soil and damp.

• Coccolithophores are exclusively marine.

• Silicoflagellates are found in marine environment.

• Dinoflagellates are both freshwater and marine.

• Green algae grow on objects that do not move such as substrate, rock.

• Brown algae - wide distribution from tropical to polar zones.

DIFFERENCES BETWEEN REPRODUCTION.

• Cyanobacteria - asexually by binary or multiple fission, fragmentation, spore formation.

• Diatom - asexually by cell division through mitosis.

• Coccolithophores - asexually by binary fission.

• Silicoflagellates - asexually

• Dinoflagellates - asexually

• Green algae - sexually or asexually by cell division, fragmentation, spore formation.

• Brown algae - sexually and asexually.

5 0
2 years ago
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