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TLS Online TPP Program

#Question id: 3801

Why should patients with xeroderma pigmentosum avoid sunlight?

#Section 3: Genetics, Cellular and Molecular Biology

  1. The UV wavelengths do irreparable damage to DNA.

  2. Sunlight inhibits any residual DNA repair activity in the cell.

  3. These patients lack pigmentation to protect them from burning.

  4. Sunlight inhibits DNA polymerases.

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TLS Online TPP Program

#Question id: 1637

#Section 2: General Biology

Protective antibodies against infectious agents are often:
TLS Online TPP Program

#Question id: 1638

#Section 2: General Biology

Intracellular parasites within macrophages are killed more readily in the presence of:
TLS Online TPP Program

#Question id: 1639

#Section 2: General Biology

T-cell surface receptors for antigen partly recognize:
TLS Online TPP Program

#Question id: 1640

#Section 2: General Biology

An immune response against grass pollen often involves:
TLS Online TPP Program

#Question id: 1641

#Section 2: General Biology

Why are secondary antibody responses better?
TLS Online TPP Program

#Question id: 1642

#Section 2: General Biology

Which cell type produces antibodies?