Individuals with the O blood group are known as universal donors because the Gal and GlcNAc groups that are recognized by the antibodies in A, B, and AB in other individuals are missing

Which of which of the following types of erythrocyte plasma membrane components lacks these GlcNAc groups?
A) a glycoprotein
B) a glycolipid
C) glycophorin
D) a GPI-anchored protein
E) a glycocalyx protein


Answer: B

Biology & Microbiology

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In the Meselson-Stahl experiment, bacterial DNA was labeled completely with heavy nitrogen (N-15)

and then grown in the presence of light nitrogen (N-14). When only mixed DNA was observed after ONE generation of growth in N-14, what was the conclusion?

a. DNA replication is semiconservative b. DNA replication is conservative c. DNA replication is dispersive d. DNA replication is either semiconservative or dispersive e. DNA replication is either semiconservative or conservative

Biology & Microbiology

Overhunting of species, such as tigers, reduces their numbers and their genetic diversity. This is an example of _____

a. a bottleneck b. a mutation

c. a founder effect d. gene flow e. genetic drift

Biology & Microbiology

What is the residual volume + expiratory reserve volume called?

A) inspiratory capacity B) vital capacity C) inspiratory reserve volume D) functional residual capacity E) tidal volume

Biology & Microbiology

All of the following bacteria are gram-positive. Which does NOT belong with the others?

A) Actinomyces B) Gardnerella C) Corynebacterium D) Listeria E) Mycobacterium

Biology & Microbiology