Chapter 11 homework

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Which of the following turns off transcription by binding to the operator

Repressor

What name is given to a gene that causes cancer?

oncogene

In an operon the ___ acts as an on/off switch.

operator

Which of these is a type of posttranscriptional regulation of gene expression?

Breakdown of proteins

Which of the following is NOT a possible use of reproductive cloning?

Creating stocks of stem cells for human therapeutic use

What is the first level of control of a eukaryotic gene transcription?

DNA packing and unpacking

What is a difference between embryonic and adult stem cells?

Embryonic stem cells are undifferentiated; adult stem cells are partially differentiated.

The process by which genotype becomes expressed as a phenotype is

Gene expression

The "master control genes" that regulate other genes and determine what body parts will develop in which locations are called?

Homeotic genes

Which of these is most likely to cause the development is a six legged frog

Mutation of homeotic genes

Introns are

Non coding DNA sequences

The lac operon is usually in the____ position and is activated by ____

Off ____lactose

How many active X chromosomes are there in a cell of a female mammal?

One

Repressors act by blocking the binding of _____ to the promoter.

RNA polymerase

In eukaryotic cells, repressor proteins inhibit transcription by binding to

Silencers

What would enable a single RNA transcript to be translated into different polypeptides

The RNA transcript can be spliced more than one way

The Initiation of transcription requires that enhancers bind to

Transcription factors

How is that the cells in different body tissues are able to perform different functions?

The cells exhibit different patterns of gene expression

When referring to cell division, oncogenes are most like______while tumor suppressor genes are most like_____.

The gas pedal on a car _____brake pedals on a car

Many proto-oncogenes regulate ______.

cell division


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