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f the sequence of bases on the mRNA codon is AUU, what would be the sequence of bases on the anticodon of the tRNA?(1 point)

Responses

UUA
UUA

UAA
UAA

ATT
ATT

TAA

9 answers

The anticodon on the tRNA is complementary to the codon on the mRNA. For the mRNA codon AUU, the complementary bases would be:

  • A pairs with U
  • U pairs with A
  • U pairs with A

Therefore, the sequence of bases on the anticodon of the tRNA would be UAA.

The correct response is:

UAA

Tetracycline is an antibiotic that blocks tRNA from entering the ribosome and associating with mRNA. If tetracycline were added to the cytoplasm of a eukaryotic cell, which types of proteins would be made?(1 point)
Responses

No proteins will be made if tRNA cannot bind to mRNA
No proteins will be made if tRNA cannot bind to mRNA

Only proteins that function in the cytoplasm of the cell
Only proteins that function in the cytoplasm of the cell

Only proteins that will be exported outside of the cell
Only proteins that will be exported outside of the cell

Only proteins that will be inserted into a membrane

Tetracycline blocks tRNA from entering the ribosome, which prevents the translation process from occurring. Since tRNA is crucial for bringing amino acids to the ribosome during protein synthesis, if tRNA cannot bind to the mRNA, then translation cannot occur, and no proteins can be synthesized.

Therefore, the correct response is:

No proteins will be made if tRNA cannot bind to mRNA.

How do prokaryotes and eukaryotes differ in how they store genetic material?(1 point)
Responses

Eukaryotes lack a true nucleus.
Eukaryotes lack a true nucleus.

Eukaryotes have RNA instead of DNA.
Eukaryotes have RNA instead of DNA.

Prokaryotes lack a true nucleus.
Prokaryotes lack a true nucleus.

Prokaryotes have RNA instead of DNA.

The primary difference in how prokaryotes and eukaryotes store their genetic material is that prokaryotes do not have a true nucleus, meaning their DNA is not enclosed within a nuclear membrane. Instead, prokaryotic DNA is typically found in a region called the nucleoid. In contrast, eukaryotes have their genetic material housed within a nucleus.

Therefore, the correct response is:

Prokaryotes lack a true nucleus.

What would happen to a cell that lacked smooth endoplasmic reticulum?(1 point)
Responses

Its cell membrane would be impermeable.
Its cell membrane would be impermeable.

It would not be able to produce tRNA.
It would not be able to produce tRNA.

It would not be able to make lipids.
It would not be able to make lipids.

It would not be able to replicate DNA.

The smooth endoplasmic reticulum (smooth ER) is primarily involved in the synthesis of lipids, including phospholipids and cholesterol, as well as the metabolism of carbohydrates and detoxification of drugs and poisons. If a cell lacked smooth ER, it would be unable to synthesize these lipids effectively.

Therefore, the correct response is:

It would not be able to make lipids.

What is the relationship between ribosomes and rough endoplasmic reticulum (ER)?(1 point)
Responses

Ribosomes attached to rough ER make proteins that the rough ER then transports around the cell
Ribosomes attached to rough ER make proteins that the rough ER then transports around the cell

Rough ER produces the polypeptide chains that ribosomes need to make protein.
Rough ER produces the polypeptide chains that ribosomes need to make protein.

Rough ER is the subunit of ribosomes that makes proteins
Rough ER is the subunit of ribosomes that makes proteins

Ribosomes transport proteins made by rough ER to the Golgi apparatus.

Ribosomes are attached to the rough endoplasmic reticulum (rough ER) and are responsible for synthesizing proteins. Once these proteins are made by the ribosomes, the rough ER plays a role in processing and transporting them within the cell.

Therefore, the correct response is:

Ribosomes attached to rough ER make proteins that the rough ER then transports around the cell.