FREE BIOLOGY AND STUDY GAMES ABOUT BIO101 CHPT

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FREE BIOLOGY AND STUDY GAMES ABOUT BIO101 CHPT

11 & 12 EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -108 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: DNA synthesized using an RNA template is called _____.

Answer:

cDNA Question 2: Which of the following enzymes can create a bond between adjacent, unjoined nucleotides?

Answer:

DNA ligase

Question 3: What is the function of a testosterone-protein complex?

Answer:

It helps RNA polymerase transcribe certain genes.

Question 4: dioxin acts by mimicking _____.

Answer:

the role of transciption factors

Question 5: A proto-oncogene is a normal gene that can change into an oncogene. Oncogenes are potentially lethal genes that can cause cancer. Why do cells continue to maintain proto-oncogenes?

Answer:

Correct: Proto-oncogenes are necessary for normal control of cell division.

Question 6: The gene for human growth factor is inserted into the

 E. colilactose operon so that it replaces the structural genes with the gene for human growth factor. What substance must be added to the bacterial culture so that it produces human growth factor?

Answer:

lactose Question 7: Why do you think that adult stem cells are found in bone marrow and the lining of the small intestine specifically?

Answer:

These cells must be a ble to regenerate various types of cells throughout life.Question 8: Golden rice has been genetically engineered. Golden rice differs from other rice varieties because it contains genes that will produce _____.

Answer:

beta-carotene Question 9: The regions of noncoding DNA showns that separate the coding regions within a gene are called _____.

Answer:

introns Question 10: The "normal" function of restriction enzymes is to _____.

Answer:

destroy foreign DNA

Question 11: What purpose does a nucleic acid probe serve?

Answer:

They both undergo complementary base pairing

Question 12: Shown below is the effect of a restriction enzyme known as EcoRI. Cutting with this enzyme allows scientists to _____.

Answer:

insert a foreign piece of DNA cut with the same restriction enzyme

Question 13: How was the smallpox vaccine produced?

Answer:

A harmless variant, a natural mutant, was used to stimulate an immune response Question 14: In frogs, when the nucleus of an intestinal cell of a tadpole is transferred to an egg whose nucleus has been removed (nuclear transplantation), some of the eggs will develop into normal tadpoles. This demonstrates that _____.

Answer:

these cells have retained all of their genetic potential Question 15: The shotgun cloning technique differs from the original method of sequencing the human genome because _____.

Answer:

the genetic and physical mapping stages can be skipped Question 16: This prevents binding of the repressor to the bacterial DNA and allows a set of genes to be transcribed. The transcription of these genes is under the control of a(n) _____.

Answer:

operon Question 17: The female tortoiseshell cat has a particular coat coloring because each cell contains how many active X chromosome(s)?

Answer:

one

Question 18: Why do cells make proteins with such a short life?

Answer:

this enables cells to control the amount of protein present.

Question 19: The recombinant molecule below was generated using which two enzymes?

Answer:

a restriction enzyme and a ligase Question 20: Which of the following is true of gene regulation in both eukaryotes and prokaryotes

Answer:

Transcription is the typical point at which gene expression is regulated.Question 21: If the human genome is so large, relative to the size of other organisms' genomes, why do we have so few genes?

Answer:

We have a lot of "junk" DNA that does not code for anything

Question 22: What does the term sticky end refer to in genetic engineering

Answer:

the generation of short fragments of single-stranded DNA left at the end of a DNA molecule Question 23: Comparison of whole genome sequences shows that we share _____ of our genome sequence with our closest relative.

Answer:

96%

Question 24: The p53 protein ___.

Answer:

initiates transcription Question 25: A signal transduction pathway activates a transcription factor that responds by

_____.

Answer:

initiating mRNA synthesis Question 26: Most proteins are much shorter-lived. What is the advantage to this?

Answer:

This enables cells to maintain a precise and efficient control over their activities.