The production of offspring is a characteristic of life that enables the continuation of a species.

1 answer:

5 0

Well that would be somewhat correct.... however not all organism mate and produce offspring, most higher orangism can only reproduce through sexual means. However some organisms don't rely on mating, and can merely split themselves in half. Starfish, for example can produce another of themselves when a limb is cut. This is called Asexual reproduction.

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T or F: Addiction is a condition of compulsive drug seeking and use, even with negative

valkas [14]

Addiction is a condition of compulsive drug seeking and use, even with negative consequences is a true statement.

Explanation:

Addiction to drugs is a chronic and a relapsing condition or disorder which results in compulsory drug seeking behavior and its continuous use despite knowing about or having negative consequences it can cause to the brain and the body systems.

This is both a medical and a mental illness due to repeatedly misusing drugs or other substances and a severe form of a spectrum of substance abuse disorders.

Addiction is classified under substance use disorder and is categorized as mild, moderate or severe according to the symptoms. The symptoms or the negative consequences of addiction are generally grouped as impaired control, risky use, social impairment, pharmacological criteria for drug tolerance or withdrawal.

8 0

3 years ago

From a chemical view, how is an amino acid is being recognized by its specific aminoacyl tRNA synthetase?

hammer [34]

During translation, rRNA and tRNA read mRNA in 5´ to 3´ direction. According to the codons being readen, tRNA transfers the correct amino acids to build the polypeptide chain. A codon is a short sequence of three nucleotides that store the genetic information for the aminoacids´ assembly.

Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid through the action of the aminoacyl-tRNA synthase enzyme. The whole complex, amino acid + enzyme + tRNA is named aminoacyl-tRNA.

Each tRNA is recognized by a specific aminoacyl-tRNA synthase enzyme. The enzyme is also capable of recognizing a specific amino acid. Let us say, for instance, that tRNA is specific for phenylalanine. The molecule is attached to the enzyme that is specific for that tRNA(Phe). Then, when the enzyme and tRNA(Phe) are together, they get to find phenylalanine. The enzyme links the aminoacid to the RNA. Once the whole complex is formed, the tRNA gets to pair its anticodon with the mRNA codon. This is,

Recognition of enzyme and the specific tRNA(aa) ⇒ aa being aminoacid
Recognition of enzyme and the specific aminoacid
Linkage of the aminoacid to RNA by the enzyme action
Pairing of tRNA anticodon to mRNA codon.

Considering that there are twenty amino acids available, there are also twenty complexes of aminoacyl-tRNA, one for each amino acid. Each of the mRNA codons represents one of the 20 amino acids used to build the protein. Each amino acid can be codified by more than one codon. Of the total 64 codons, 61 codify amino acids, and one is a start codon. The left three codons are stopping translation points.

tRNA decodes genetic information from the nucleotidic sequence in the mRNA molecule and allows amino acids to align composing the new protein.

Once the new peptidic link joins, placing together the new amino acid to the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.

In conclusion, a specific aminoacyl-tRNA synthase enzyme recognizes a tRNA, which is also specific for a certain amino acid. When together, the enzyme recognizes the amino acid and links it to the RNA. The whole complex is known as aminoacyl-tRNA. Once the tRNA is joined to its amino acid, it gets to pair a codon of mRNA to add that amino acid to the new synthesizing protein.

6 0

2 years ago

In general, traffic circles are controlled by __________ .

PtichkaEL [24]

In a traffic circle, roundabout signs control the traffic. I hope this helps. :)

4 0

3 years ago

Research the differences that exist between mitosis and binary fission. Identify at least one difference, and explain why it is

barxatty [35]

Binary fission is a method of asexual reproduction which single-celled organisms, usually prokaryotes, use to create a copy of themselves.
Mitosis is cell division that results in two identical daughter cells and is primarily used for growth of an organism

7 0

3 years ago

The differences between DNA and RNA are (name two:)

My name is Ann [436]

Answer:

Explanation:

The two difference between DNA and RNA are as follows:

1. The DNA is double stranded genetic material whereas RNA is single stranded.

2. The structure of DNA exhibit deoxyribose sugar whereas the RNA exhibit ribose sugar.

8 0

3 years ago