Syndecans are cell-surface proteoglycans that:

a. bind to collagens.

b. bind to multi-adhesive matrix proteins.

c. anchor cells to the extracellular matrix.

#Question id: 1986

#Section 2: General Biology

The following events occur when a mammalian immune system first encounters a pathogen. Which shows the correct sequence in which they occur?

I.   Pathogen is destroyed.

II.  Lymphocytes secrete antibodies.

III. Antigenic determinants from pathogen bind to antigen receptors on lymphocytes.

 IV.  Lymphocytes specific to antigenic determinants from pathogen become numerous.

V.   Only memory cells remain.

#Question id: 1418

#Section 3: Genetics, Cellular and Molecular Biology

Apoptosis can be induced by a mitochondrial protein being released into the cytosol. This protein binds directly to what in the cytosol?

#Question id: 16436

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

The PCR consists of three defined sets of times and temperatures, termed steps

#Question id: 27167

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

The image given below is related to

#Question id: 2151

#Section 2: General Biology

Which of the following statement(s) is (are) true of transmembrane proteins?

a. All contain a hydrophobic α helix.

b. Some serve as membrane attachment sites for peripheral membrane proteins.

c. Some contain more than one membrane-spanning domain.

d. All are asymmetrically oriented in the lipid bilayer.