Can someone tell me what the heck this video is saying I'm so confused plz

What term is used to describe bacterial cells that can naturally take up dna from their environment?

Maru [420]

<h2>The correct answer is: Competent cells</h2>

Explanation:

Bacterial cells have the capability of incorporating foreign naked DNA or deoxyribonucleic acid fragments from the environment or the exterior of the cell to the interior of the cell. This process is known as Transformation.
The bacterial cells which are able to undergo transformation are called Competent bacterial cells.
Some of the bacterial cells are naturally competent like<em> Bacillus subtilis, Streptocossus pneumoniae</em> while others like <em>Escherishia coli </em>need to be chemically treated to make them artificially competent.
In natural competence, the foreign DNA from the cell exterior is incorporated into the cell interior through specific protein complexes present in the plasma membrane of the bacterial cells.
In artificial competence, the negative charge on foreign DNA is masked by positively charged calcium ions (so that it is not repelled by the negative charge of the lipid bilayer of the bacterial cell plasma membrane) and then small pores are created in the lipid bilayer of the plasma membrane of the bacterial cells by giving a heat shock to the cells. This results in the uptake of the DNA by the bacterial cells.

3 0

2 years ago

Construct a food chain . label the producer, primary consumer, secondary consumer and tertiary

kati45 [8]

Grass - producer
Aphid - primary consumer
Ladybird - secondary consumer
Swallow (bird) - tertiary consumer

6 0

3 years ago

(a)

mash [69]

Because it has to be that way

5 0

2 years ago

Help me with this 2 questions number 3 A and B i mark you as brainlist please

Roman55 [17]

3A- Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.

3B- Negative feedback loops are used to maintain homeostasis and achieve the set point within a system. Negative feedback loops are characterized by their ability to either increase or decrease a stimulus, inhibiting the ability of the stimulus to continue as it did prior to sensing of the receptor.

Hope I’ve helped ;)

8 0

3 years ago

C cells of the thyroid gland secrete __________. C cells of the thyroid gland secrete __________. tetraiodothyronine cortisol ca

Leni [432]

C cells of the thyroid gland secrete calcitonin.

<h3>What does C cells of thyroid gland produce?</h3>

The thyroid follicle, which is the gland's active component, is encircled by a single layer of epithelial cells, and the lumen is stuffed with colloidal material.
It includes parafollicular cells, or C cells, which release calcitonin.
The C-cells of the thyroid gland secrete calcitonin, a 32 amino acid hormone.
When the concentration of blood calcium has grown over the usual range, the thyroid gland releases the hormone calcitonin, which lowers the level.
The parafollicular cells, sometimes referred to as the C cells, of the thyroid gland are the principal producers of this polypeptide hormone, which has 32 amino acids.

Learn more about thyroid gland here:

brainly.com/question/27523862

#SPJ4

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: The C cells of the thyroid gland secrete

a) TSH.

b) parathormone.

c) thyroxine.

d) triiodothyronine.

e) calcitonin

6 0

1 year ago