F the sequence of a cDNA has matches with DNA sequences in the genome, then this genomic DNA is likely to _____
A) code for a protein
B) code for a ribozyme
C) code for an rRNA
D) be part of an intron
E) be a regulatory sequence
Answer: A
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Which of the following is an example of therapeutic cloning?
a. Splitting an embryo into two halves to produce two embryos within a laboratory b. Using cells from a cloned human embryo for medical purposes c. Asexual cloning in bacteria d. Transferring DNA of an adult donor's body cell into an unfertilized egg e. Splitting of an embryo within the uterus, producing identical twins
Nutritional mutants in Neurospora can be "cured" by treating the medium with substances in the defective metabolic pathway. What determines whether the mutant strain (auxotroph) is "cured" by a particular substance?
What will be an ideal response?
Which kingdom contains heterotrophs with cell walls of chitin?
a. Proista b. Fungi c. Plantae d. Animalia
The most important ion in controlling the movement of water into and out of the guard cells is
A. carbon. B. hydrogen. C. potassium. D. nitrogen. E. sodium.