A plasma cell secretes approximately ________ antibody molecules per second over its life span of ________ days.
A) 10,000 : 4-7
B) 2000 : 7-10
C) 2000 : 4-7
D) 2000 : 10-20
E) 10,000 : 7-10
Ans: C) 2000 : 4-7
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The cascade of enzyme reactions that ends in clot formation is begun by ________
a. the exposure of collagen in the damaged vessel wall b. albumin contacting the basement membrane c. the conversion of fibrinogen to fibrin d. exposure of blood to air
In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of ________
A) satellited chromosomes B) Y chromosomes C) X chromosomes D) chromomeres E) centromeres
Which of the following statements regarding the flow of genetic information is false?
A) Polypeptides form proteins that determine the appearance and function of the cell and organism. B) Eukaryotic mRNA is processed in several ways before export out of the nucleus. C) Transcription occurs in the cytoplasm of eukaryotic cells. D) Ribosomes function as factories that coordinate the functioning of mRNA and tRNA.
What is the structure of centromeric DNA sequences?
What will be an ideal response?