The surface of each B lymphocyte is covered with about 250,000 to 500,000 identical copies of (BCR/MHC/TCR)
What will be an ideal response?
BCR
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Which one of the following is maintained during a chemical reaction?
A. the number of atoms present in the reactants B. the identity of the atoms present in the reactants C. the arrangement of chemical bonds present in the reactants D. the number and identity of the atoms present in the reactants E. the number and identity of the atoms, and the arrangement of chemical bonds present in the reactants.
Diagrams of gene order and spacing on chromosomes are
A. phenotypes. B. genotypes. C. linkage maps. D. karyotypes. E. metabolic maps.
Which of the following is a true statement about growth in plants?
a. Only primary growth is localized at meristems. b. Some plants lack secondary growth. c. Only stems have secondary growth. d. Only secondary growth produces reproductive structures. e. Monocots have only primary growth, and eudicots have only secondary growth.
Genes are found in the same order for large stretches of the X chromosome in the rat and mouse genomes, indicating
A. conservation of neoteny. B. conservation of synteny. C. occurrence of aneuploidy. D. formation of pseudogenes.