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Nookie1986 [14]
2 years ago
9

Transformation is a process in which bacteria take up new DNA released by dead cells and integrate it into their own genomes (se

e Chapter 9). In Streptococcus pneumoniae (which causes many cases of pneumonia, inner-ear infections, and meningitis), the ability to carry out transformation requires from 105 to 124 genes, collectively termed the com regulon. The com regulon is activated in response to a protein called competence-stimulating peptide (CSP), which is produced by the bacteria and exported into the surrounding medium. When enough CSP accumulates, it attaches to a receptor on the bacterial cell membrane, which then activates a regulator protein that stimulates the transcription of genes within the com regulon and sets in motion a series of reactions that ultimately result in transformation. Does the com regulon in S. pneumoniae exhibit positive or negative control
Biology
1 answer:
andrew11 [14]2 years ago
6 0

Answer:

Positive (inducible)

Explanation:

Increased levels of CSP induce the receptor to stimulate transcriptional activator functions, which allow gene expression to occur similar to what happens in positive inducible.

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Base your answer to the question on the passage below and on your knowledge of biology
Delvig [45]

Darwin concluded that the finches all shared a common ancestor but had  developed different beak structures.  The second sentence best describes as an ecosystem.

Explanation:

  • When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the islands Darwin also observed that each finch variety  ate a different type of food and lived in a slightly different habitat from the other finches, Darwin concluded that the finches all shared a common ancestor but had  developed different beak structures. The second sentence best describes as an ecosystem.
  • An ecosystem is a huge group of living organism such as plants,animals, micro-organisms in a particular area.
  • An ecosystem is a community of living organisms related with the nonliving components in the  environment, together interacting as a system.
  • its abiotic constituents, includes minerals, climate, soil, water, sunlight, and all other nonliving elements, and its biotic constituents, consists of all its living members.

4 0
3 years ago
A woman with normal BRCA alleles has a child with a man who has one mutated BRCA1 allele. What is the probability that the child
grigory [225]

Answer:

50%

Explanation:

According to the given information, the woman has normal BRCA alleles while the man carries one copy of the mutated BRCA allele (BRCA1). A diploid organism such as human beings can have two BRCA alleles. A child gets one BRCA allele from the mother and the other from the father.

The child of the couple would get one normal allele from the woman. However, with respect to the BRCA allele, the man would form two types of gametes in equal proportion. The 50% of his gametes would have the mutated BRCA1 allele while the rest 50% would carry the normal BRCA allele. Therefore, the man can transmit either normal or mutated BRCA allele to the child. So, there are 50% chances for the child to get the mutated allele.

6 0
2 years ago
Newton’s blank law explains why my hand hurts when I clap loudly
AveGali [126]

It would be Newton's "3rd" Law that explains why my hands hurt when I clap loudly, since this states that every action as an equal and opposite reaction.


5 0
2 years ago
Read 2 more answers
(b) Most globular proteins are denatured and lose their activity when briefly heated to 65 8C. However, globular proteins that c
frez [133]

Answer:

Explanation:

The higher temperature is the factor which is responsible for the process of denaturation of proteins in which the breaking down of hydrogen, disulphide bonds and destabilization occurs. This process breaks up the bond between the polypeptides.

The bovine pancreatic trypsin inhibitor comprises of 58 amino acids this consists of the disulphide bonds which are destroyed on heating as a result of this the inhibitor becomes inactive. But on cooling it comes to the original form as the internal structure starts making hydrogen and disulphide bonds again. Thus the activity of the BPTI again gets restored.  

6 0
3 years ago
The three basic parts of the neuron can be likened to an arm, where the fingers represent the _____; the palm of the hand repres
Nadya [2.5K]

Answer:

The correct answer is D) dendrites; cell body; axon

Explanation:

Neurons cells makes the nervous system and are responsible for carrying the information from one body part to the other body parts. A neuron has three distinct parts dendrites and axon.  

Dendrites are the neurons extension which receives the impulse and transfers to the cell body. We can link dendrite with our fingers. Cell body is a spherical part of neuron like our palm and it controls all functions of the cell. Then from cell body signals are transferred to axons.

Axon is a long part of the nerve cell like our hand which helps in transmitting the signals to the next neurons. Therefore the correct answer is D.

6 0
3 years ago
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