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TLS Online TPP Program

#Question id: 1970

What are antigens?

#Unit 4. Cell Communication and Cell Signaling

  1. proteins found in the blood that cause foreign blood cells to clump

  2. proteins embedded in B cell membranes

  3. proteins that consist of two light and two heavy polypeptide chains

  4. foreign molecules that trigger the generation of antibodies

More Questions
TLS Online TPP Program

#Question id: 23116

#Unit 2. Cellular Organization

Choose the correct statement 
a. The nucleosome is a disc with DNA organized into 22/3 turns around the core .
b. The nucleosome is a disc with DNA organized into 12/3 turns around the surface.
c. The nucleosome is a disc of 11 nm diameter and 6 nm height.
d. The nucleosome is a cylinder of 6 nm diameter and 11 nm height.
TLS Online TPP Program

#Question id: 28470

#Unit 5. Developmental Biology

blastomere of a 2-cell embryo can form both trophoblast cells and the embryo precursor cells of the ICM, these very early cells are said to be___.
TLS Online TPP Program

#Question id: 11188

#Unit 7. System Physiology – Animal

Refer to the following graph of an action potential to answer the question.

The minimum graded depolarization needed to operate the voltage-gated sodium and potassium channels is indicated by the label ________.
TLS Online TPP Program

#Question id: 13000

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the correct statement regarding the structure
TLS Online TPP Program

#Question id: 4741

#Unit 8. Inheritance Biology

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?