Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

#Question id: 996

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is (are) true of the oxidation of 1 mol of palmitate (a 16-carbon saturated fatty acid; 16:0) by the B-oxidation pathway, beginning with the free fatty acid in the cytoplasm?

1. Activation of the free fatty acid requires the equivalent of two ATPs.

2. Inorganic pyrophosphate (PPi) is produced.

3. Carnitine functions as an electron acceptor.

4. 8 mol of FADH2 are formed.

5. 8 mol of acetyl-CoA are formed.

6. There is no direct involvement of NAD+.

#Question id: 5321

#Unit 11. Evolution and Behavior

Biologists now routinely test for homology between genes in different species. If genes are determined to be homologous, how are they related to each other?

#Question id: 2067

#Unit 2. Cellular Organization

Which of the following would likely diffuse through the lipid bilayer of a plasma membrane most rapidly?

#Question id: 890

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the misfolded protein or defective Protein causes disease as follows;

               Disease                                             Defective Protein

A)  Parkinson’s disease                                  i) Amyloid-β protein

B)  Alzheimer’s disease                                  ii) Superoxide dismutase

C) Huntington’s disease                                iii) Lysozyme

D) Lysozyme amyloidosis                             iv) α-Synuclein

E) Amyotrophic lateral sclerosis                   v) polyglutamate expansion

Match the correct disease with its misfolded proteins;

#Question id: 15250

#Unit 2. Cellular Organization