When a substance undergoes a phase change, the massincreases

decreases

stays the same

increases or decreases depending on the phase change

Answers

Answer 1

Answer: The answer is "stays the same".

Whether what kind of process the substance undergoes, the mass will stay the same. When a substance undergoes a phase change, the weight of the substance would either increases or decreases but the mass will definitely stay the same.

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Certain microbes, foreign tissues and some cancerous cells can cause immune response in human body because all three contain

Answers

Answer:

The answer is antigens

Contains antibodies so its immune

An mRNA is 429 nucleotides long. The number of amino acids in the polypeptide chain formed from this mRNA is(A) 143.
(B) 142.
(C) 141.
(D) 429.
(E) 428.

Answers

B. 142. This is because one of the molecules has to be a stop codon which doesn't code for an amino acid. So there are only 426 nucleotides coding for the polypeptide chain. It takes 3 nucleotides to code for an amino acid. So 426 divided by 3 is 142, which is the amount of amino acids that will be part of this chain.

Final answer:

An mRNA of 429 nucleotides will form a polypeptide chain with 143 amino acids, assuming each codon (set of 3 nucleotides) corresponds to an amino acid and the stop codon is not counted.

Explanation:

For the synthesis of protein in a process known as translation, each triplet set of nucleotides in the mRNA, called a codon, identifies a specific amino acid. Hence, an mRNA of 429 nucleotides would be segmented into a set of 3 to form the different codons for the amino acids. Since 429 divided by 3 is 143, the polypeptide chain resulting from this mRNA would have 143 amino acids.

In this case, the correct answer would be (A) 143. This calculation does not take into account the stop codon that does not correspond to an amino acid, but usually examination questions ignore the effect of the stop codon. To provide the most accurate answer, we would need to know if the mRNA sequence includes the stop codon or not.

Learn more about Protein Synthesis here:

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What are found in the space surrounding the nucleus of an atom

Answers

an atom consists of a neuclus containg protons and neutrons which are surrounded by electrons
hope this helped

Which type of marine ecosystem supports the least life and why?

Answers

Untamed sea pelagic biological systems.

These aren't near mainlands or landmasses, and ordinarily are drained in no less than one constraining element mineral, for example, iron.

CANT GET WRONGThe human respiratory system consists of various organs that work together to accomplish the vital task of bringing oxygen into the body. One organ listed is part of a system that helps with digestion rather than respiration. The organ that is incorrectly paired with a respiratory function is the
A) nose - filters and warms air
B) bronchi - moves air into the lungs
C) diaphragm - muscle that powers breathing
D) esophagus - moves air from the nose into the lungs

Answers

d. esophagus moves air from nose into the lungs

A fossil bone is tested, and no c-14 is found. What can be said about the fossil's age?A.it's 5,730 years old
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