A panel of cell lines was created by human—mouse somatic-cell hybridization. Each line was examined for the presence of human chromosomes and for the production of an enzyme. The following results were obtained: 

On the basis of these results, which chromosome has the gene that encodes the enzyme? 

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#Question id: 3271

#Unit 11. Evolution and Behavior

Consider hemophilia A, a clotting disorder caused by an X-linked recessive allele with a frequency (q) of approximately 1 in 10,000. The frequency of the disease among females and among male respectively

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#Question id: 19461

#Unit 13. Methods in Biology

Phase-contrast microscopy is suitable for observing which kind of sample?

1. Single cells 

2. Group of cells

3. Thin cell layers

4. Thick cell layers

Which of the following options is correct?

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#Question id: 26528

#Unit 3. Fundamental Processes

Which of the following statement is true regarding RNA polymerase III

1.RNA polymerase III transcribes a set of short genes

2.The classical class III genes (types I and II) have promoters that lie wholly within the genes.

3.Box A and Box B is the characteristics of RNA polymerase III type II

4.Box A and Box B is the characteristics of RNA polymerase III type I

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#Question id: 5824

#Unit 8. Inheritance Biology

___ is a second mutation at a different location in the genome that compensates for the effects of an original, first mutation.

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#Question id: 11264

#Unit 9. Diversity of Life Forms

Prokaryotic ribosomes differ from those present in eukaryotic cytosol. Because of this, which of the following is correct?