Antibodies are
A) derived from vitamins.
B) carbohydrate molecules.
C) amino acid molecules.
D) produced by T cells.
E) protein molecules.
E
You might also like to view...
Which evolutionarily ancient brain structure is responsible for the formation of long-term memories, particularly of places?
a. hypothalamus b. hippocampus c. amygdala d. frontal lobe e. occipital lobe
The immune system ____
a. works by attacking anything recognized as foreign b. plays no role in fighting cancer c. often accelerates development of malignant cancers d. works by turning off specific genes in an individual's DNA e. is highly resistant to genetic modification
The "endosymbiont theory" states that eukaryotic cells work together to form a multicellular organism.
a. true b. false
Labeling.The following statements refer to the accompanying figure showing the fine structure of a leaf
Figure 27.12A
A. Epidermis is labeled ____. B. Cells rich in chlorophyll and thus the main sites of photosynthesis are in layers labeled ____. C. The spongy mesophyll is labeled ____.