Familial adenomatous polyposis coli (APC) is characterized by a small deletion in chromosome 5. In which cells is this deletion present in affected individuals?

A) somatic cells
B) germline cells
C) colon polyps
D) colon epithelial cells
E) all cells


E) all cells

Biology & Microbiology

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Arsenic poisoning can lead to organ failure and death. Though arsenic can inhibit or interfere with a number of cellular enzymes, arsenic poisoning is thought to be mainly due to indirect inhibition of enzymes involved in both pyruvate oxidation and the Krebs cycle. As a result, this compound must be able to enter which cellular compartment?  

A.  The cytoplasm B.  The nucleus C.  The intermembrane space of the mitochondria D.  The mitochondrial matrix E.  The endoplasmic reticulum Clarify Question What is the key concept addressed by the question? What type of thinking is required?   Gather Content   What do you already know about pyruvate oxidation and the Krebs cycle? What other information is related to the question?   Choose Answer   Do you have all necessary information to determine where arsenic poisoning would have its greatest impact within the cell?  

Biology & Microbiology

Similarity in any type of biological trait resulting from shared ancestry is called ____

a. homology b. homoplasy c. exaptation d. anagenesis e. cladogenesis

Biology & Microbiology

A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive

isotope potassium-40, which has a half-life of 1.3 billion years. The rock now contains 3 mg of the isotope. About how old is the rock?

a. 2.6 billion years b. 5.2 billion years c. 1.3 billion years d. 0.3 billion years e. 0.4 billion years

Biology & Microbiology

Evolution is the 

A. slow change in the genetic makeup of a population of organisms over many generations. B. fast change in the genetic makeup of a population of organisms over many generations. C. slow change in the genetic makeup of an individual over a lifetime. D. fast change in the genetic makeup of an individual over a lifetime.

Biology & Microbiology