Asked by e

Which of the following demonstrates the central dogma of molecular biologists?(1 point)
Responses

DNA and RNA hold the code to create proteins that are the key to gene expression.
DNA and RNA hold the code to create proteins that are the key to gene expression.

DNA and RNA mutate into either harmful or helpful effects on the human body.
DNA and RNA mutate into either harmful or helpful effects on the human body.

Proteins replicate DNA which gives the expression of traits to an organism.
Proteins replicate DNA which gives the expression of traits to an organism.

Gene expression relies on environmental factors that determine which traits are dominant.
Gene expression relies on environmental factors that determine which traits are dominant.
Answered by e
After the amino acid chain leaves the ribosome, which organelle then folds, modifies, and transports the protein?(1 point)
Responses

Lysosome
Lysosome

Endoplasmic Reticulum
Endoplasmic Reticulum

Ribosome
Ribosome

Cytoplasm
Answered by e
Look at the DNA sequence.

C G T T A C T G C A A T
G C A A T G A C G T T A
Which sequence shows a substitution mutation?

(1 point)
Responses

C G T C T A C T G C A A T
G C A G A T G A C G T T AC G T C T A C T G C A A T G C A G A T G A C G T T A

C G T T A C T G C A A T
G C A A T G A C G T T AC G T T A C T G C A A T G C A A T G A C G T T A

C G T A C T G C A A T
G C A T G A C G T T AC G T A C T G C A A T G C A T G A C G T T A

C G T G A C T G C A A T
G C A C T G A C G T T A
Answered by e
Which of the following best describes how a liver cell and skin cell have the exact same DNA sequence and yet look different and perform different functions?(1 point)
Responses

The cells discard the DNA that is not in use.
The cells discard the DNA that is not in use.

The cells mutate during transcription.
The cells mutate during transcription.

The tRNA uses a different sequence in each cell during transcription.
The tRNA uses a different sequence in each cell during transcription.

The proteins are expressed differently in each cell.
Answered by e
Stella described protein synthesis as a process that makes the necessary proteins for the human body to function. She explained the process in the following steps.

DNA is transcribed into mRNA.
Amino acids form a chain.
The amino acid chain is folded into a protein in the endoplasmic reticulum.
What step did Stella miss in her explanation?

(1 point)
Responses

DNA is replicated into two daughter cells.
DNA is replicated into two daughter cells.

tRNA delivers the DNA to the ribosome.
tRNA delivers the DNA to the ribosome.

Polypeptide chains express gene traits.
Polypeptide chains express gene traits.

mRNA is translated into amino acids.
Answered by GPT-4o mini
The response that demonstrates the central dogma of molecular biology is:

**DNA and RNA hold the code to create proteins that are the key to gene expression.**

The central dogma describes the flow of genetic information from DNA to RNA (transcription) and then from RNA to proteins (translation), which are crucial for gene expression.
Answered by GPT-4o mini
The correct response is:

**Endoplasmic Reticulum**

After the amino acid chain leaves the ribosome, it typically enters the endoplasmic reticulum (ER), where it is folded, modified, and transported to its final destination.
Answered by GPT-4o mini
A substitution mutation occurs when one base in the DNA sequence is replaced by another.

Looking at the given sequences:

1. **C G T C T A C T G C A A T**
**G C A G A T G A C G T T A**
→ This sequence shows multiple substitutions (G instead of T in the first sequence and A instead of C in the second).

2. **C G T T A C T G C A A T**
**G C A A T G A C G T T A**
→ This is the original sequence, so it does not show any mutations.

3. **C G T A C T G C A A T**
**G C A T G A C G T T A**
→ This sequence shows substitutions (A instead of T in the first sequence and T instead of C in the second).

4. **C G T G A C T G C A A T**
**G C A C T G A C G T T A**
→ This sequence shows substitutions (G instead of T in the first sequence and C instead of A in the second).

Based on the options provided, the sequence that shows a substitution mutation is:

**C G T A C T G C A A T**
**G C A T G A C G T T A**

This indicates a substitution mutation occurred where T was substituted for A in the first strand and C was substituted for A in the second strand.
Answered by GPT-4o mini
The response that best describes how a liver cell and a skin cell have the exact same DNA sequence yet look different and perform different functions is:

**The proteins are expressed differently in each cell.**

Different types of cells express different sets of genes, leading to the production of specific proteins that determine their structure and function. This process is known as gene expression.
Answered by GPT-4o mini
The step that Stella missed in her explanation of protein synthesis is:

**mRNA is translated into amino acids.**

After DNA is transcribed into mRNA, the next step involves the translation of mRNA into a sequence of amino acids at the ribosome, forming the polypeptide chain. This step is critical in the process of protein synthesis.