TLS Online TPP Program
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TLS Online TPP Program
#Question id: 15303
#Unit 4. Cell Communication and Cell Signaling
Neurofibromatosis, a benign tumor of the sheath cells that surround nerves, is caused by
a. Loss of both alleles of NF1
b. Mutation in RAS GAP-type protein
c. A single mutant NF1 allele
d. Mutation in SRC protein
TLS Online TPP Program
#Question id: 11941
#Unit 7. System Physiology – Animal
Under conditions of normal renal function, which of the following is true of the concentration of urea in tubular fluid at the end of the proximal tubule?
TLS Online TPP Program
#Question id: 12693
#Unit 8. Inheritance Biology
A panel of cell lines was created by human-mouse cell line hybridization. Each line was examined for the presence of human chromosome and for the gene production. The following result were obtained;
On the basis of these results, which chromosome has the gene that encodes the enzyme ?
TLS Online TPP Program
#Question id: 11337
#Unit 10. Ecological Principles
In which of the following biomes would we expect to find permafrost?
TLS Online TPP Program
#Question id: 12570
#Unit 10. Ecological Principles
Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now in a biodiversity crisis?