7 - The Messenger - Transcription

Labelling

Label the enzymes on the diagram

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DNA Helicase

DNA Polymerase III

DNA Polymerase I

Single Strand Binding Proteins

Labelling

Label the diagram

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Okazaki Fragments

Replication fork

Primer

Open Ended

Replicate the following DNA Strand

(Be sure to include direcitonality)

5' - TAT AAG ACC GGC CTC - 3'

Labelling

Label the diagram

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RNA

nucleotides

DNA

Labelling

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Template Strand

Non-Template Strand

mRNA

Hotspot

Label the 5'

Hotspot

Label the 3'

Open Ended

Transcribe the following DNA Strand

(Be sure to include direcitonality)

5' - TAT AAG ACC GGC CTC - 3'

Multiple Select

Phosphorylation is a process that adds a phosphate group onto a protein to “activate” it—that is, to change its shape enough that it can function properly.

Which step(s) in the phosphorylation cascade illustrated in Model 2 include phosphorylation?

• Protein Kinase 1

• Protein Kinase 2

• Protein Kinase 3

• Transcription Factors

Multiple Choice

What is the cell’s response to the signal received in Model 2?

• Activate trancription factors to replicate DNA

• Activate transcription factors to translate DNA

• Activate transcription factors to transcribe DNA

• Activate kinases to translate RNA

Labelling

Label the diagram

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Coding Strand

Template Strand

promotor

RNA Polymerase

Multiple Choice

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.

Multiple Choice

How would the DNA sequence GCTATA be transcribed to mRNA?

• GCUAUA
• CGATAT
• CGAUAU
• GCUTUT

Multiple Choice

The process represented in the diagram produces a molecule that is complementary to the template strand of DNA. What type of molecule is produced?

• New DNA
• Polypeptide
• Messenger RNA
• Carbohydrate

Multiple Choice

What signals where transcription will stop?

• stop codon

• terminator sequence

• where the lagging strand is

• red light

Multiple Choice

What is the process called in which introns are removed and exons are joined together in a pre-mRNA molecule?

• Translation

• Transcription

• Splicing

• Replication

Multiple Choice

A model of a process involving nucleic acids is shown in Figure 1.

Which of the following best explains what process is represented in Figure 1?

• New DNA strands are being synthesized in the 3' to 5' direction from their DNA templates.

• New DNA strands are being synthesized in the 5' to 3' direction from their DNA template.

• New RNA strands are being synthesized in the 3' to 5' direction from their DNA templates.

• Two new RNA strands are beign syntehsized in both directions from their DNA templates.

Multiple Choice

Figure 1 represents part of a process essential to gene expression.

Which of the following best explaisn what strand X represents?

• A complementary RNA sequence, because it containes thymine.

• The coding strand in the prcess because itis being read 3' to 5'

• The antisense strand, because it is serving as a template.

• The pre-mRNA, because it does not yet have a GTP cap.

Multiple Choice

A model that represents a process occuring in a cell of a particular organism is shown in Figure 1.

Which of the following correctly explains the process shown in Figure 1?

• DNA replicaiton is occuring because replication is semi-conservative and the new strand is a copy of the template strand.

• Initiation of transctiption is occuring because a strand of RNA is being produced from a DNA template strand.

• Translation is occuring because the two strands have separated and a new strand is being produced.

• Alternative pslicing of mRNA is occuring because the mRNA strand is being synthesized from only one strand of DNA.

Open Ended

In plants, genes invovled in chlorophyll synthesis are located in both the nucleus and cholorplasts. Some variegated plants (with both green and white leaves and shoots) have mutations that prevent them from synthesizing chlorophyll thourghout their leaves. In an effort to understand the genetics underlying chlorophyll synthesis, scientists performed the crosses shown in Figure 1.

Describe how genetic information is carried in chloroplasts and mitochondria.

(remember the basic components of a cell)

Open Ended

In plants, genes invovled in chlorophyll synthesis are located in both the nucleus and cholorplasts. Some variegated plants (with both green and white leaves and shoots) have mutations that prevent them from synthesizing chlorophyll thourghout their leaves. In an effort to understand the genetics underlying chlorophyll synthesis, scientists performed the crosses shown in Figure 1.

Explain how the inheritance pattern shown in Figure 1 supports a role for chloroplast genes in the production of chlorophyll in the variegated plants.

Open Ended

In plants, genes invovled in chlorophyll synthesis are located in both the nucleus and cholorplasts. Some variegated plants (with both green and white leaves and shoots) have mutations that prevent them from synthesizing chlorophyll thourghout their leaves. In an effort to understand the genetics underlying chlorophyll synthesis, scientists performed the crosses shown in Figure 1.

Ovules produced by an entirely grene plant contain a rare mutation in a nuclear gene that is invovled in chlorphyll synthesis, and the gene encodes a nonfunctional protein. Predict the most likely color of the leaves on plants that are produced when these ovues are fertilized by pollen from a wild-type green plant,

Provide reasoning to justify your prediction