How can gene expression be choordinated into different body tissues?

Common regulatory sequences that share the same receptors, but are found in different types of cells, express different proteins.

Gene expression is solely determined by DNA sequence.

All tissues express the same genes equally.

Gene expression is only influenced by environmental factors.

Organize the descriptions to the correct mRNA structure

snipped out from final mRNA transcript

protects mRNA from enzyme digestion by assisting in leaving nucelus

assists mRNA to bind to ribosomes

delays enzymatic breakdown in the cytoplasm

What best describes alternative splicing?

Exons can be spliced together in alternative ways to produce multiple protien versions of the same RNA transcript

A way to eliminate introns from mRNA.

Introns can be spliced together in alternative ways to produce multiple protien versions of the same RNA transcript

A process that only occurs in prokaryotic cells.

Explain how organization of euakrtyoic genetic material into introns and exons increase phenotypic variation.

Alternative splicing allows multiple protein variants to be produced from a single gene.

Eukaryotic genes are only composed of exons.

Introns and exons do not affect protein production.

Alternative splicing reduces the number of protein variants.

Select all that describe mircro RNA

mRNA is destroyed if it matches the microRNA sequence

mRNA is silenced if the mRNA partially matches the micro RNA

mRNA is destroyed if the microRNA partially matches it

mRNA is silenced if it matches the microRNA

Eukaryotic gene regulation is influenced by

transcription factors, enhancers, silencers, chromatin structure, epigenetic modifications

Arsenic is a toxic element found in both aquatic and terrestrial environments. Scientists have found genes that allow bacteria to remove arsenic from their cytoplasm. Arsenic enters cells as arsenate that must be converted to arsenite to leave cells. Figure 1 provides a summary of the arsenic resistance genes found in the operons of three different bacteria. E. coli R773 is found in environments with low arsenic levels. Herminiimonas arsenicoxydans and Ochrobactrum tritici are both found in arsenic‑rich environments. Researchers claim that bacteria that live in environments heavily contaminated with arsenic are more efficient at processing arsenic into arsenite and removing this toxin from their cells. Justify this claim based on the evidence shown in Figure 1.

There are multiple operons controlling the production of proteins that process and remove arsenite from cells in both H. arsenicoxydans and O. tritici. In contrast, E. coli has only one operon devoted to arsenic removal.

Both H. arsenicoxydans and O. tritici contain the arsR gene that codes for a repressor that turns on the operon to eliminate arsenite from the cell.

Both O. tritici and E. coli contain the arsD gene, which codes for a protein that helps remove arsenite from the cell.

Both H. arsenicoxydans and O. tritici. have more arsenic resistance genes than has E. coli.

Both liver cells and lens cells have the genes for making the proteins albumin and crystalline. However, only liver cells express the blood protein albumin and only lens cells express crystalline, the main protein in the lens of the eye. Both of these genes have enhancer sequences associated with them. The claim that gene regulation results in differential gene expression and influences cellular products (albumin or crystalline) is best supported by evidence in which of the following statements?

Liver cells possess transcriptional activators that are different from those of lens cells.

Liver cells and lens cells use different RNA polymerase enzymes to transcribe DNA.

Liver cells and lens cells possess the same transcriptional activators.

Liver cells and lens cells possess different general transcription factors.

Phytochromes are molecules that change light stimuli into chemical signals, and they are thought to target lightactivated genes in plants. A study was conducted to determine how certain cell proteins were made in a plant cell using a phytochrome. Figures 1 and 2 represent findings from the study. Use the response models shown in Figures 1 and 2 to justify the claim that phytochromes regulate the transcription of genes leading to the production of certain cellular proteins.

When inactive phytochrome Pr is activated by red light to become phytochrome Pfr, it is transported into the nucleus where it binds to the transcription factor PIF3 at the promoter. This stimulates transcription, ultimately leading to protein production. Far-red light inactivates the phytochrome, which will turn transcription off by not binding to PIF3.

Far-red light activates phytochrome Pr, causing it to travel to the nucleus where it binds to PIF3 at the promoter. This stimulates transcription, ultimately leading to protein production. Red light inactivates the phytochrome, which will turn transcription off by not binding to PIF3.

MYB, and not Pfr, is activated by red light, causing it to bind to the promoter and stimulate transcription and translation of cellular proteins.

PIF3 binds to the promoter only in the presence of red light and Pfr. Any time is PIF3bound to the promoter, MYB is transcribed, initiating transcription of various other proteins in the cell.

6.6 Eukaryotic Gene Regulation

6.6 - Eukaryotic Gene Regulation

Interactive Video

•

Science

•

12th Grade

•

Easy

Rachel von Bodungen

Used 1+ times

FREE Resource

17 questions

Show all answers

CATEGORIZE QUESTION

3 mins • 1 pt

Organize the following into the correct cellular category

Groups:

(a) Eukaryote

(b) Prokaryote

Cell membrane

1 chromosome

multicellular

Ribosomes

no organelles

Cytoplasm

compartamentalization

trillions of cells

specialized cells

thousands ofgenes

DNA

unicellular

many chromosomes

membrane bound organelles

nucleus

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes cell specialization?

Cell specialization is the process by which cells with identical DNA develop into distinct types with specific functions unique to the cell's niche.

Cell specialization is when all cells perform the same function.

Cell specialization refers to the random function of cells.

Cell specialization is the process of cell division.

CATEGORIZE QUESTION

3 mins • 1 pt

Organize these options into the right categories

Groups:

(a) Histones

(b) Methylation

loose chromatin

allows transcription

condensed chromatin

loosens DNA for transcription

binds DNA tightly so transcription cannot occur

prevents transcription

condense DNA into chromosomes

acetyl group added to histone

proteins used to wrap DNA

methyl group added to histone

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Reversible chemical modifications to DNA
(select all that apply)

UV Radiation

acetlyation

methylation

methanogen exposure

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Modifications of DNA packaging

mutations

replication

histone wrapping

enzymatic digestion

CATEGORIZE QUESTION

3 mins • 1 pt

Organize the following to the correct category

Groups:

(a) Epigenetics

(b) Cell differentiation

proteins expressed based on the packaging of the DNA

responsible for cellular differentitation

cells develop a niche depending on chemical signals from surrounding cells

cells express the proteins specific to a specialized tissue

reversible chemical modification of DNA

CATEGORIZE QUESTION

3 mins • 1 pt

Differentiate gene regulation for prokaryotes and eukaryotes

Groups:

(a) Prokaryotes

(b) Eukaryotes

single DNA sequence

operator

regulatory protein

promoter

operon

multiple DNA sequences

transcription factors

mediator protein

activator protein

RNA polymerase

bending protein

DNA sequences

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6.6 - Eukaryotic Gene Regulation

17 questions

Organize the following into the correct cellular category

Which of the following best describes cell specialization?

Organize these options into the right categories

Reversible chemical modifications to DNA(select all that apply)

Modifications of DNA packaging

Organize the following to the correct category

Differentiate gene regulation for prokaryotes and eukaryotes

How can gene expression be choordinated into different body tissues?

Organize the descriptions to the correct mRNA structure

What best describes alternative splicing?

Access all questions and much more by creating a free account

Popular Resources on Wayground

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Reversible chemical modifications to DNA
(select all that apply)