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3 years ago

Bacteria containing plasmid vectors are often identified by which process?

Biology

1 answer:

Lemur [1.5K]3 years ago

8 0

Answer:

Option B, exposing the bacteria to an antibiotic that kills cells lacking the plasmid

Explanation:

Bacteria that have plasmid are selected from the ones that do not plasmid by placing them on antibiotics plates. As the bacteria that have plasmid within it will possess an antibiotic resistant gene due to which they are able to survive on the antibiotics plate and form colonies. While the bacteria that do not have plasmid die. These colonies of plasmid bacteria’s are grown to make large cultures from which plasmid protein is derived.

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Question 3<br> Which of the following statements about environmental changes is true?

Serggg [28]

Answer:

The options are

A) they may affect several populations in an ecosystem

B) they cannot be caused by human activity

C) they affect food chains but not food webs

D) They have no effect on living organisms in an ecosystem him

The answer is A) they may affect several populations in an ecosystem

Explanation:

Environmental changes include deforestation and climate changes. Organisms depend on their habitat and climatic conditions for their survival because it determines their food availability too.

When environmental change occurs they may affect several populations in an ecosystem.

8 0

3 years ago

Differentiation of cells is responsible for which feature of complex organisms? Without differentiation, complex organisms would

cricket20 [7]

I think it will be

b)be multicellular

Differentiation of cell is the process by which cell becomes spesialized in order to perform different functions))

3 0

3 years ago

Which of the following is true about cells?

shtirl [24]

Answer:

Explanation:

Hope this helps

7 0

2 years ago

Which of these Earth spheres interacts with coral reefs to cause coral bleaching?

Svetllana [295]

Answer:

you need to attach a photo.

Explanation:

5 0

2 years ago

What is the term for the nucleotide sequences that are removed during mrna processing?

Ne4ueva [31]

The correct answer is: introns

Processing of mRNA is process that occurs only in eukaryotic cells. After the transcription, newly formed mRNA molecule is called and it must be processed into a messenger RNA (mRNA). Processing includes:

• Addition of a 5' cap to the beginning of the RNA

• Polyadenilation- addition of a poly-A tail (tail of A nucleotides) to the end of the RNA

• Splicing- removal of introns and linking the exons

After these steps mRNA is mature and used for the further steps (e.g. translation).

Sometimes some genes are alternatively spliced.

7 0

3 years ago