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Rashid [163]
2 years ago
10

Beginning within the nucleus, the first step leading to the synthesis of a polypeptide is _____. beginning within the nucleus, t

he first step leading to the synthesis of a polypeptide is _____. linking of nucleotides to form a polypeptide removal of introns from rna and the stitching together of exons transferring of information from dna to messenger rna translation of a dna nucleotide sequence into a sequence of amino acids translation of an rna nucleotide sequence into a sequence of amino acids
Biology
1 answer:
aniked [119]2 years ago
4 0
Gene expression involves formation of various proteins from specific genes. The expression starts with the process of transcription where DNA is transcribed into a mRNA  by enzyme RNA polymerase. Then mRNA diffuses out of the nucleus and the process of translation takes place in the ribosomes generating a polypeptide then a protein is formed. Therefore, the correct answer is transferring of information from DNA to messenger RNA (transcription).
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One of the four nucleotide bases in dna is replaced by a different base in rna. which base is it, and what is it replaced by?
andrey2020 [161]
DNA has thymine and RNA has uracil both of which pair with adenine.

Hope that helps.
4 0
2 years ago
Muscle cells contain numerous __________ to serve their high demand for atp.
Harrizon [31]
Muscle cells, also known as myocytes, contain numerous amounts of mitochondria inside of their cytoplasm. Mitochondria are organelles that are popularly known as the powerhouse of the cell because they function to process different biochemicals (such as glucose, oxygen, etc) and produce essentially Adenosine Triphosphate (ATP). Kreb's Cycle in particular talks about energy production, and the mitochondria is one of the main units where this cycle happens. You can think of ATP as the currency of the body in terms of energy. The more ATP one has, the more energy there is available for use by the different systems of the body. Muscles in particular have high demand for ATP.
4 0
2 years ago
Which of the following statements is an accurate description of proteins? Which of the following statements is an accurate descr
Brut [27]

Answer:

b. the 20 amino acids found in proteins differ in the composition of their R groups, which may be either polar or charged.

Explanation:

Since the proteins are polymers joined by a big number of amino acids, all the joins occur the same way because in all the amino acids there is always one part that is exactly the same in all of them.

The rest of the molecule in the amino acids, the R group, is different in each one, that is the characteristic of each one, and this is the part that can give the name and some other chemical properties.

5 0
1 year ago
Read 2 more answers
Which statement describes the relationship between the lizard and the frog on the food web?
Snezhnost [94]

Answer: A.) Heterotrophs compete for the same food source.  

A food chain is a linear sequence in which food and energy is being transfered when one organism is fed the another organism in an ecosystem. A food web is a interconnection of two or more food chains. Heterotrophs are  organisms which are dependent upon other organisms for the food requirement. In the given condition, the lizard and frogs are the heterotrophs which are dependent upon insects for their food requirement.

<em>Hence, heterotrophs compete for the same food source is the correct statement to describe the relationship between the lizard and the frog on the food web. </em>

7 0
2 years ago
Read 2 more answers
A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the ot
Anni [7]

Options for the question have not been give. They are as follows:

A. P site

B. A site

C. E site

D. directly to the cytosol

E. exit tunnel

Answer:

C. E site

Explanation:

Translation is the process by which mRNA is converted into polypeptide chain. Translation machinery has three binding slots for tRNA : A, P and E. Any incoming tRNA encounters A, P and E site in that order.

When a new tRNA (#1) carrying the next amino acid (here, lysine) comes, it enters the A site. Peptide bond is formed between lysine and the already existing amino acid on the growing polypeptide chain on the preceding tRNA (#2). Once lysine is added to the polypeptide chain, the entire chain moves to tRNA #1 which makes tRNA #2 empty. Meanwhile, the machinery moves forward. As a result, tRNA #1 slides to P site and tRNA #2 slides to E site. The A site is empty now and can receive another tRNA.

4 0
2 years ago
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