Question

1. label the enzymes different parts using the word bank below. some words may be used more than once

enzyme enzyme - substrate complex product substrate active site

1. according to the graph on the right, what is the optimal temperature for the enzyme?

1. explain what happens to the enzyme at temperatures higher than 60 degrees celsius.

1. identify the types of rna used in each of the following processes.

transcription	translation

1. what do most enzymes end in?

(graph: enzyme activity vs. temperature, x - axis: temperature (°c) from 0 to 70, y - axis: enzyme activity (increasing))

Explanation:

Question 2

Step1: Understand the graph

The graph is titled "Enzyme Activity vs. Temperature" with the x - axis as temperature (°C) and the y - axis as enzyme activity (increasing). The curve of enzyme activity first rises with the increase of temperature and then falls.

Step2: Find the optimal temperature

The optimal temperature of an enzyme is the temperature at which the enzyme activity is the highest. From the graph, we can see that the peak of the curve (the highest enzyme activity) occurs around 40 - 50 °C (more precisely, looking at the x - axis scale, the peak is at about 40 - 50 °C, and usually, for many enzymes, the optimal temperature is around 40 - 50 °C, and from the graph's shape, the highest point is around 40 - 50 °C, let's assume it's around 40 - 50 °C, and more accurately, looking at the x - axis labels (0,10,20,30,40,50,60,70), the peak is between 40 and 50, maybe around 40 - 50 °C, and typically, the optimal temperature is where the activity is maximum, so we find the temperature corresponding to the highest point on the curve.

Enzymes are proteins (or in some cases RNA). At temperatures higher than 60 degrees Celsius, the high temperature provides enough kinetic energy to break the weak bonds (such as hydrogen bonds, hydrophobic interactions) that maintain the three - dimensional structure of the enzyme, especially the structure of the active site. This process is called denaturation. When the enzyme denatures, the active site loses its specific three - dimensional conformation that is complementary to the substrate. As a result, the enzyme can no longer bind to the substrate effectively, and the catalytic activity of the enzyme (the ability to speed up the chemical reaction) decreases significantly, and may even be completely lost.

• Transcription: In transcription, the main type of RNA involved is messenger RNA (mRNA). Transcription is the process of synthesizing mRNA from a DNA template. The DNA sequence is transcribed into an mRNA sequence, where the mRNA carries the genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm. Also, RNA polymerase (which is a protein - RNA complex, but the RNA part here is not a major functional RNA for the product of transcription) is involved, but the key RNA produced in transcription is mRNA.
• Translation: In translation, three main types of RNA are involved:
• Messenger RNA (mRNA): It carries the genetic code (in the form of codons) from the DNA (via transcription) to the ribosome. The codons on the mRNA determine the sequence of amino acids in the polypeptide chain.
• Transfer RNA (tRNA): It has an anticodon at one end and carries a specific amino acid at the other end. The tRNA reads the codons on the mRNA and brings the corresponding amino acid to the ribosome for polypeptide synthesis.
• Ribosomal RNA (rRNA): It is a major component of ribosomes. Ribosomes are the sites of translation, and rRNA, along with ribosomal proteins, forms the structure of the ribosome, which has the A (aminoacyl), P (peptidyl), and E (exit) sites that are important for the translation process.

So for the table:

Transcription	Translation

Answer:

The optimal temperature for the enzyme is around 40 - 50 °C (more precisely, from the graph, the peak is at about 40 - 50 °C, often around 40 - 50 °C, and if we take the mid - point of the peak's x - axis, it's around 40 - 50 °C, for example, 40 - 50 °C, and more accurately, looking at the graph, the highest activity is at around 40 - 50 °C, so the optimal temperature is approximately 40 - 50 °C (or more precisely, from the graph's x - axis, the peak is at about 40 - 50 °C, so the optimal temperature is around 40 - 50 °C, like 40 - 50 °C, and in many cases, the optimal temperature for enzymes (like human enzymes) is around 37 °C, but this graph shows a peak around 40 - 50 °C, so according to the graph, the optimal temperature is the temperature at the peak of the enzyme activity curve, which is around 40 - 50 °C, let's say around 40 - 50 °C, and more precisely, from the x - axis values (0,10,20,30,40,50,60,70), the peak is between 40 and 50, so the optimal temperature is about 40 - 50 °C (for example, 40 - 50 °C, and if we have to give a single value, maybe 40 - 50 °C, or more accurately, looking at the graph, the highest point is at about 40 - 50 °C, so the optimal temperature is around 40 - 50 °C).

Question 3