Question

1.	Check all genes you would expect to be significantly expressed in eye cells.

A.the RPSA gene

B. the OPN1SW gene

C. the OCT-4 gene

D. the INS gene

2.	Check all genes you would expect to be significantly expressed in stem cells.

A.the RPSA gene

B. the OPN1SW gene

C. the OCT-4 gene

D. the INS gene

3.	Check all genes you would expect to be significantly expressed in pancreatic cells.

A.the RPSA gene

B. the OPN1SW gene

C. the OCT-4 gene

D. the INS gene

4.	In the article "Scientists Coax Human Embryonic Stem Cells Into Making Insulin", scientists produced specialized cells and injected them into mice. Based on information in the article and what you know about cells, what were these cells able to do. Check all that apply.

A. Sense light and allow vision.

B. Use ribosomes to produce proteins

C. Differentiate into any type of cell.

D. Produce and secrete insulin.

5.	Choose all of the following statements that accurately describe differences between different types of differentiated cells.

A. The DNA sequence (at the level of As, Ts, Cs, and Gs) is different in the different cells.

B. The functions of the cells are different.

C. The proteins present in different types of cells are different.

D. The morphologies of the cells are typically different.

6.	What roles do regulatory transcription factors play in regulation of transcription?

A. They can recruit chromatin remodeling proteins that loosen the chromatin.

B. They can bind to the mRNA and cause it to be degraded before it is translated.

C. They can transcribe the DNA to make mRNA.

D. They can bind to enhancers and recruit general transcription factors.

7.	What process produces two new cells when a stem cell divides?

A. the cell cycle and mitosis

B. apoptosis

C. cellular respiration

D. regulation of gene expression

8.	Which process is responsible for producing the differences in cells in your body that have different characteristics?

A. the cell cycle and mitosis

B. DNA replication

C. cellular respiration

D. regulation of gene expression

9.	In order for eukaryotic genes to be expressed, what must happen with the chromatin?

A. The chromatin must be degraded.

B. The chromatin must attach to spindle fibers.

C. The chromatin must loosen.

D. The chromatin must coil tightly.

10.	Why is the tightness of chromatin coiling important for regulating gene expression?

A. Loosening of the chromatin allows space for transcriptional enzymes and proteins to work.

B. Tightly coiled chromatin allows spindle fibers to align chromosomes during metaphase.

C. Loosening of the chromatin allows DNA cutting enzymes to degrade the DNA into small pieces.

D. Tightly coiled chromatin allows RNA polymerase to efficiently read the template strand and produce mRNA.

Answer 1

Hi,

1. OPN1SW

2. OCT-4

3. INS

4. Differentiate into any type of cell. & Produce and secrete insulin.

5. The functions of the cells are different, The proteins present in different types of cells are different & The morphologies of the cells are typically different.

6. They can recruit chromatin remodelling proteins that loosen the chromatin & They can bind to enhancers and recruit general transcription factors.

7. the cell cycle and mitosis

8. regulation of gene expression

9. The chromatin must loosen

10. Loosening of the chromatin allows space for transcriptional enzymes and proteins to work.

Hope this helps you.