12.1 - RNA(20pts.)

In the process of ​ (a)   DNA is used as a template for making another type of nucleic acid called ​ (b)   . The process begins when the enzyme ​ (c)   binds to a

region called the promoter.​

• transcription

• RNA

• polymerase

• DNA

• translation

Answer explanation

In the process of transcription, DNA is used as a template for making RNA. The enzyme polymerase binds to the promoter region to initiate the process.

Tags

HS-LS1-1

Organize these options based on the Nucleic Acid

Groups:

(a) DNA

,

(b) mRNA

,

(c) rRNA

,

(d) tRNA

• 
• 
• Carries Amino Acids

• 
• Carries the code to make proteins

• Is a copy of a Gene from DNA

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

The diagram shows the process in which pre-mRNA is changed into

mRNA.

Which events are described in the diagram?

• Introns are removed, and remaining exons are spliced together.

• Exons are removed, and remaining introns are spliced together.

• Introns and exons are removed, and remaining DNA is spliced together.

• Introns are removed, condensed, and then combined again.

Answer explanation

The correct events described in the diagram are that introns are removed, and the remaining exons are spliced together, leading to the formation of mRNA.

Tags

HS-LS1-1

In which ways is RNA different from DNA?

Select three properties that apply to RNA, but not DNA.

• generally single-stranded

• contains thymine

• contains uracil

• contains the sugar ribose

• contains the sugar deoxyribose

Answer explanation

RNA is generally single-stranded, contains uracil instead of thymine, and has the sugar ribose, which are properties not found in DNA.

Tags

HS-LS1-1

In transcription, segments of ​ (a)   serve as templates to produce complementary ​ (b)   molecules.

• DNA

• mRNA

• rRNA

• tRNA

Answer explanation

In transcription, segments of DNA serve as templates to produce complementary mRNA molecules.

Tags

HS-LS1-1

What is the function of the enzyme RNA polymerase?

• It is a repressor protein that stops transcription from occurring.

• It is an enzyme that will allow transcription to occur.

• It is an enzyme that will break apart the operon into three separate pieces.

• It is lactase, the enzyme that dissolves lactose, and the product of the

  operon.

Answer explanation

RNA polymerase is an enzyme that allows transcription to occur, making it the correct choice.

Tags

HS-LS1-1

Ribosomes use mRNA to make proteins. What is the process that makes proteins?

• Photosynthesis

• Protein Synthesis

• Dehydration Synthesis

• Cellular Respiration

Answer explanation

The correct process that makes proteins is Protein Synthesis, where ribosomes use mRNA to assemble amino acids into proteins.

Tags

HS-LS1-1

What is the role of tRNA in protein synthesis?

• It replicates the DNA.

• It carries amino acids to the ribosome.

• It synthesizes new strands of DNA.

• It assists in the modification of mRNA.

Answer explanation

tRNA carries amino acids to the ribosome during protein synthesis, facilitating the translation of mRNA into a polypeptide chain.

Which of the following best describes the process of transcription?

• Copying of DNA into a new strand of DNA

• Assembly of a protein based on the sequence of mRNA

• Copying of DNA into mRNA

• Modification of mRNA before translation

Answer explanation

Transcription is the process of copying DNA into mRNA, making it the best description among the answer choices provided.

Tag the promoter region being blocked by a repressor protein.

Tags

HS-LS1-1