Amyotrophic lateral sclerosis (ALS) disrupts
muscle contraction by
a. binding actin.
b. blocking myofibril.
c. killing motor neurons.
d. weakening myofilaments.
e. none of these.
C
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What can be said about Drosophila development?
A. Paternal genes determine the initial course of development after fertilization. B. Zygotic genes determine the initial course of development after fertilization. C. Maternal genes determine the initial course of development after fertilization. D. Syncytial blastoderm genes determine the initial course of development after fertilization.
Each DNA parent strand within a replication bubble acts as a template strand that produces:
A. either a leading strand or a lagging strand. B. two leading strands or two lagging strands. C. one leading strand and one lagging strand. D. only leading strands. E. only lagging strands.
Which molecule is incorrectly matched with the number of carbon atoms it possesses?
A) citrate-6 B) ?-ketoglutarate-5 C) acetyl CoA-2 D) malate-5 E) isocitrate-6
Which structure is the major site of antibody production and a disposal site for old red blood cells?
a. Thymus b. Spleen c. Lymph vessels d. Tonsils e. Bone marrow