ordering question\nclick and drag on elements in order\nplace the following steps in the order in which they…

ordering question\nclick and drag on elements in order\nplace the following steps in the order in which they occur.\ninstructions\nthe trna that is complementary to the mrna moves into the p site.\nonce the mrna is associated with the ribosome, a trna with the anticodon cau will move in.\nwhen mrna leaves the nucleus, the two parts of a ribosome come together and attach to the mrna to complete the ribosome.\nthe trna with the anticodon aug binds to the mrna start codon—aug—on the 5 end of the mrna.

ordering question\nclick and drag on elements in order\nplace the following steps in the order in which they occur.\ninstructions\nthe trna that is complementary to the mrna moves into the p site.\nonce the mrna is associated with the ribosome, a trna with the anticodon cau will move in.\nwhen mrna leaves the nucleus, the two parts of a ribosome come together and attach to the mrna to complete the ribosome.\nthe trna with the anticodon aug binds to the mrna start codon—aug—on the 5 end of the mrna.

Answer

Brief Explanations:

To determine the order, we analyze the process of translation (protein synthesis). First, mRNA leaves the nucleus and the ribosome assembles on it. Then, the initiator tRNA (with anticodon UAC, but wait, the given step has anticodon AUG? Wait, no—start codon is AUG, so tRNA anticodon should be UAC. But among the given steps, we follow the provided options. Let's re - evaluate:

  1. The first step in translation initiation is the mRNA leaving the nucleus and the ribosome subunits associating with it: "When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome."

  2. Then, the initiator tRNA (which should have anticodon UAC to bind AUG, but the given step is "The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA." Maybe there's a typo, but following the given steps, this would be the next step as it's about the tRNA binding to the start codon.

  3. Next, "The tRNA that is complementary to the mRNA moves into the P site." Wait, no—after the initiator tRNA is in the P site, then the next tRNA (with anticodon CAU, which would bind to GUA codon) comes in. Wait, the step "Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in" should be after the initiator tRNA is in place. Wait, maybe the correct order is:

Step 1: When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

Step 2: The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA. (Even though the anticodon - codon pairing here seems off, we follow the given steps)

Step 3: The tRNA that is complementary to the mRNA moves into the P site. (Wait, no, the initiator tRNA is in the P site. Maybe this step is misphrased. Then step 4: Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

Wait, let's re - order properly based on translation process:

  • Initiation: mRNA binds to ribosome (after leaving nucleus).

  • Then initiator tRNA (with anticodon UAC) binds to AUG start codon (but in the given steps, it's "The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA"—maybe a mistake, but we use the given steps).

  • Then, the tRNA is in the P site (the step "The tRNA that is complementary to the mRNA moves into the P site").

  • Then, the next tRNA (with anticodon CAU) moves in (the step "Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in").

So the correct order is:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.

  3. The tRNA that is complementary to the mRNA moves into the P site.

  4. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

Wait, no, that doesn't make sense. Let's try again. The correct translation initiation steps are:

  1. mRNA exits nucleus and ribosome assembles on it.

  2. Initiator tRNA (with anticodon UAC) binds to AUG start codon (in P site).

  3. Then, the next tRNA (with appropriate anticodon) enters the A site. But the given steps have:

  • Step about ribosome assembly: "When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome."

  • Step about tRNA with anticodon AUG binding to AUG: "The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA."

  • Step about tRNA moving to P site: "The tRNA that is complementary to the mRNA moves into the P site."

  • Step about tRNA with anticodon CAU moving in: "Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in."

Assuming that the tRNA with anticodon AUG is the initiator (even though the pairing is AUG - AUG which is wrong, but we follow the given text), the order should be:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.

  3. The tRNA that is complementary to the mRNA moves into the P site.

  4. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

Wait, no, the step "Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in" should come after the ribosome is assembled and the initiator tRNA is in place. So the correct order is:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.

  3. The tRNA that is complementary to the mRNA moves into the P site.

  4. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

Alternatively, maybe the correct order is:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.

  3. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

  4. The tRNA that is complementary to the mRNA moves into the P site.

No, this is confusing. Let's use the standard translation initiation steps:

  • mRNA binds to small ribosomal subunit.

  • Initiator tRNA (with anticodon UAC) binds to AUG start codon (in P site).

  • Large ribosomal subunit binds, forming complete ribosome.

Then elongation: next tRNA enters A site.

Given the steps:

  • Step 1: "When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome." (ribosome assembly)

  • Step 2: "The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA." (initiator tRNA binding)

  • Step 3: "The tRNA that is complementary to the mRNA moves into the P site." (maybe this is the initiator tRNA in P site)

  • Step 4: "Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in." (next tRNA in A site)

So the order is:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.

  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.

  3. The tRNA that is complementary to the mRNA moves into the P site.

  4. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.

Answer:

  1. When mRNA leaves the nucleus, the two parts of a ribosome come together and attach to the mRNA to complete the ribosome.
  2. The tRNA with the anticodon AUG binds to the mRNA start codon—AUG—on the 5' end of the mRNA.
  3. The tRNA that is complementary to the mRNA moves into the P site.
  4. Once the mRNA is associated with the ribosome, a tRNA with the anticodon CAU will move in.