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netineya [11]
2 years ago
12

The yellow ring inside the bacterial cell represents the bacterial DNA. Why does this structure disappear by step 3 of the lytic

cycle?
will give Brainliest
3- synthesis.this is when replication of viral nucleic acid and protein and envelope.

Biology
1 answer:
adell [148]2 years ago
6 0

Answer:

The bacterial DNA gets degraded at step 3 of the viral lytic cycle.

Explanation:

Viruses are organisms that are incapable of replicating on their own, hence, they require a living host which they infect and use its replicational ability to reproduce theirselves. The infection cycle of this virus is regarded as its replication cycle. Viruses employ either the LYTIC or LYSOGENIC cycle for infection.

The lytic cycle involves killing of their host cell at the end of the cycle. Generally, the cycle starts with the attachment of my the virus to the cell membrane of its host using specific receptor sites (step 1). It then penetrates the host cell as seen in step 2.

After penetration, the virus then secretes certain degrading enzymes called ENDONUCLEASES that degrades the bacterial DNA. After which the virus uses the replicational and gene expressing ability of the host to transcibe its genetic material and replicate itself. This process called SYNTHESIS occurs in step 3.

Hence, the yellow ring in the image that represents bacterial DNA disappears in step 3 (synthesis stage) because it gets degraded by viral digesting enzymes.

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what function does the limb serve in each animal? how are the limb bones of the four animals similar? based on these similaritie
slamgirl [31]

Answer:

The humans use this limb to grab things, body language, and sign language.

The dogs use this limb for all kinds of weight-bearing activities like walking, jumping, running et cetera.

Birds use this to fly and whales use it as flapper.

The limbs of all these four animals are the example of homologous organs that is, they all are similar in structure but adapted to perform different functions during the course of evolution.

For example, in all four organisms, the limb is made up of the same set of bones such as humerus, radius, ulna, carpals, metacarpals, and phalanges.

Homology in structure shows that they must have evolved from a common ancestor and diverge to perform different functions as an adaptation to the contrasting environment.

4 0
2 years ago
Read 2 more answers
Which characteristic of the genetic code lowers the likelihood of mutation?
Rudik [331]
Degeneracy

Degeneracy simply means that most of the amino acids produced during protein synthesis from DNA is coded by more than one codon. A codon is a sequence of 3 <span>nucleotides that codes for a specific amino acid.

Because more than 1 codon can produce the same amino acid, the chances of having the synthesis of proteins affected by mutations (i.e. point mutations) is decreased. For example, if the codon with the nucleotide series GAA, which codes for the amino acid glutamate, becomes the codon GAG, the codon will still produce glutamate because the code is degenerate. </span>
8 0
2 years ago
A researcher incubates a cell with radiolabeled amino acids. These amino acids are incorporated into the proteins as they are sy
Nonamiya [84]

Answer:

During an investigation, the addition of radiolabeled amino acids during protein synthesis occurs when the data shows high levels of radiation in protein synthesis, packaging and transport, which is equivalent to saying that radioactivity levels would first increase in the rough endoplasmic reticulum, followed by the Golgi and then the secretory vesicles (option C).

Explanation:

Protein synthesis in the cell is a process that involves the formation of polypeptide chains with the successive incorporation of amino acids.

RNA, which contains the sequence of triplets or codons that form the genetic code, is coupled to the ribosomes. Each codon or triplet consists of three nucleotides and encodes specific amino acids.

The RNA chain contains a specific nucleotide sequence and determines the assembly of amino acids to a polypeptide chain, by the action of ribosomes present in the rough endoplasmic reticulum.

In the Golgi apparatus, the proteins formed are conjugated, with the addition of carbohydrates or lipids, and arranged in secretory vesicles for transport.

In these steps, where the labeled amino acids are present, the levels of radioactivity would increase in the rough endoplasmic reticulum, the Golgi apparatus and the secretory vesicles.

Learn more:

Protein synthesis steps brainly.com/question/884041

6 0
2 years ago
Read 2 more answers
The last part of the metamorphosis of a tadpole to an adult frog results in the disappearance of the tail. This stage of develop
Tju [1.3M]

Answer:

A) cells of the tail dying and the nutrients being absorbed and reused by the body

Explanation:

The tails of the tadpole die when metamorphosing into an adult frog through a process Called Apoptosis. Apoptosis happens when it’s necessary for the body to kill some cells for development or other factors.

The cells which are killed produces nutrients which are then used and reabsorbed back into the body system of the frog.

7 0
2 years ago
A single gene produces two different proteins, utilizing different exons. What is the most likely explanation?
Helen [10]

Answer:   Differences in mRNA splicing.

Explanation:

The exon is the region of a gene that is not separated during the cutting and splicing process and thus remains in the mature messenger RNA. In genes encoding a protein, it is the exons which contain the information to produce the protein encoded in the gene. In these cases, each exon encodes a specific portion of the complete protein, so that the set of exons forms the coding region of the gene. In eukaryotes, the exons of a gene are separated by long regions of DNA (called introns) which do not code.

RNA splicing is a post-transcriptional process of maturing RNA from which certain sequential fragments are removed. This process is very common in eukaryotes, and can occur in any type of RNA, although it is more common in mRNA. It consists of removing the introns from the primary transcript and then binding the exons. Particularly, <u>alternative RNA splicing takes place when one gene can produce different proteins as a result of what segments are considered as introns and exons</u>. When different segments are considered exons, the result is a great diversity of mature transcripts which produce different proteins.

<u>So, gene splicing is a post-transcriptional modification in which a gene can code for many proteins, which makes it an important source of protein diversity.</u>

6 0
2 years ago
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