Exam 6: Dna: the Molecule of Life

Do all cells of the body express the same genes?

The small circular molecules of DNA commonly found in bacteria are called ________.

Why does transcription occur in the nucleus and not in the cytoplasm in eukaryotes?

DNA profiling relies on an individual's ________,no two of which are the same between different people,except identical twins.

What is the role of primers in the PCR techniques?

What is the main function of DNA helicase in DNA replication?

True or false? Humans contain more genes in their genome than any other species on Earth.

Gel electrophoresis separates DNA fragments according to their ________.

What do the letters D-N-A stand for?

If the base sequence of template strand reads GCCATTAC,what is the base sequence of the mRNA?

Which enzyme is responsible for adding complementary DNA bases to an exposed DNA strand?

A collection of cloned DNA fragments representing an organism's entire genome is called a ________.

Cancer is ________.

What type of mutation leads to a frameshift in the reading of DNA?

The mighty chestnut tree once dominated many of our Appalachian forests but was decimated by an exotic fungus in the first part of the 20th century.A few small groves of trees still remain in isolated pockets,and living roots of some of the fallen ancient trees still try to send up new shoots.These shoots always die as soon as they are exposed to the fungus.How could chestnut trees be genetically modified to be resistant to the fungus and to grow again?

The type of mutation that alters the nucleotide sequence of a gene but does not alter the amino acid sequence of the protein produced from that gene is called ________ mutation.

A cloned mammal is made by removing the DNA from the unfertilized egg of an egg donor, replacing it with DNA from a cell of a mature animal, and then implanting that cell into the uterus of a surrogate mother. The cell then divides and behaves as if it were a regular embryo. Answer the following question(s) regarding a clone. -Will the clone typically be sterile or fertile?

A cloned mammal is made by removing the DNA from the unfertilized egg of an egg donor, replacing it with DNA from a cell of a mature animal, and then implanting that cell into the uterus of a surrogate mother. The cell then divides and behaves as if it were a regular embryo. Answer the following question(s) regarding a clone. -Of whom is the baby a clone?

Entire genes may be deleted,inverted,replicated,or even translocated to another chromosome.Explain how each one could potentially result in cancer.

Which of the following is not a modification to the mRNA?