QUESTION 1 Choose the one correct answer The presence of lac

QUESTION 1

(Choose the one correct answer) The presence of lactose.....

activates the transcription of lacZ, but inhibits transcription of lacY and lacA

inhibits the lac operon.

activates the transcription of lacY and lacA, but inhibits transcription of lacZ

is necessary to activate the lac operon.

QUESTION 2

Transcription in bacteria is controlled without promoter regions.

True

Fals

QUESTION 3

Which of the following statements is TRUE regarding enhancers? (Choose the one correct answer)

Enhancers are regions of DNA which are always located within the promoter and help inhibit transcription.

Enhancers are regions of DNA which are always located within the promoter and help activate transcription.

Enhancers are regions of DNA that may located near or far from the transcription initiation start site that are bound by activator proteins to help activate transcription.

Enhancers are protein activators that bind to the promoter region of DNA

QUESTION 4

The 5\' Cap that is placed on mRNA in eukaryotes plays what role(s)? Choose ALL that apply.

aids in mRNA splicing.

Stabilizes mRNA.

Aids in Ribosomal (translational machinery) recognition of mRNA.

Aids in export of mRNA out of nucleus.

QUESTION 5

The RNA component and not the proteins, of the RNA splicing machinery is responsible for splicing mRNA.

True

False

QUESTION 6

Which of the following is FALSE regarding Alternative Splicing? (Choose ALL that apply)

Alternative splicing alternates involves the inclusion of different exons within a given gene.

Alternative splicing involves the inclusion of different introns within a given gene.

Alternative splicing occurs at extremely high levels in nervous tissue.

Alternative splicing allow for multiple mRNA transcripts to be expressed from one gene

QUESTION 7

Which of the following is FALSE regarding Dissociator? (Choose the one correct answer.)

It \'s presence within a color gene disrupts pigment production.

It is a transposable genetic element.

It\'s movement is controlled by a second element called \'Activator\'.

Movement of Dissociator only occurs during early development.

QUESTION 8

An antigen can be a protein, nucleic acid, or a polysaccharide.

True

False

QUESTION 9

Which of the following statements is TRUE regarding the cell cycle? Choose ALL that APPLY.

DNA damage that occurs after the Restriction Point will not arrest the cell cycle since the cell has passed the \'point of no return\'.

CDKs are activated by CKIs

CDKs are downregulated by cyclins.

Mature, differentiated cells exit the cell cycle into a resting phase called G0.

QUESTION 10

Homeotic genes display spacial colinearity.

True

False

	A.	activates the transcription of lacZ, but inhibits transcription of lacY and lacA
	B.	inhibits the lac operon.
	C.	activates the transcription of lacY and lacA, but inhibits transcription of lacZ
	D.	is necessary to activate the lac operon.

Solution

Q1 D.... Is necessary to activate the lac operon.

Q2 FALSE

Q3 C ...Enhancers are regions of DNA that may located near or far from the transcription initiation start site that are bound by activator proteins to help activate transcription.

Q4 D Aids in export of mRNA out of nucleus.

Q5 ... FALSE

Q6 B ...Alternative splicing involves the inclusion of different introns within a given gene.

Q7...C It\'s movement is controlled by a second element called \'Activator\'.

Q8... TRUE

Q9....A.. DNA damage that occurs after the Restriction Point will not arrest the cell cycle since the cell has passed the \'point of no return\'.

Q10.... TRUE..

BE HAPPY I ANSWERED ALL10PARTS INSTEAD OF JUST 4 AS WAS REQUIRED BY CHEGG .... NEED STILL HELP I WILL BE GLAD TO ASSIST JUST LEAVE THE COMMENT ....