Scientists are trying to find ways to induce tumor angiogenesis

a. true
b. false


Ans: b. false

Biology & Microbiology

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What specifically happens when the myosin

bound ATP is hydrolyzed to ADP and Pi?

a. the myosin converts to a high energy state b. the myosin converts to a low energy state c. the energy released from ATP causes the release of calcium from endoplasmic reticula d. myosin and actin form a cross-bridge e. the sarcomere contracts

Biology & Microbiology

Scientists have found that the lifetimes of mRNAs coding for pair-rule regulatory elements in Drosophila embryos may last only a few minutes. What does this suggest about the overall developmental plan of an animal body?

A) The role of mRNAs is less important than the position of genes in chromosomes. B) Homeotic genes have greater impact in forming an embryo than mRNA from pair-rule genes. C) Building an animal body requires a sequence of precisely timed steps. D) Timing of pair-rule sequence determination is not as important as spatial signaling.

Biology & Microbiology

The pairing of homologous chromosomes

A. only occurs in mitosis. B. is called synapsis. C. is called crossing over. D. occurs during telophase I. E. occurs during anaphase II.

Biology & Microbiology

Phospholipids are important components of the ______.

a) waxy coverings on leaves b) ring structures of steroids c) double bonds in hydrocarbon chains d) plasma membranes of cells

Biology & Microbiology