You are planning to perform some protein-protein interaction studies to identify a receptor for a steroid hormone you have been working on. You start by fractionating the cell. What cell fraction would you want to work with to identify the steroid hormone receptor of interest?
A. The plasma membrane fraction
B. The extracellular fraction
C. The cytoplasmic fraction
D. The mitochondrial fraction
E. The ribosomal fraction
C. The cytoplasmic fraction
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Which of the following statements is NOT true of Gram-positive bacteria?
A. They have a thicker peptidoglycan layer than do Gram-negative bacteria. B. They turn purple when subjected to the Gram-staining process whereas Gram-negative bacteria stain pink. C. They lack the lipopolysaccharide that Gram-negative bacteria have. D. They fluoresce at a different color than do Gram-negative bacteria. E. They have a gram molecular weight of more than 1.0 whereas Gram-negative bacteria have a gram molecular weight of less than 1.0.
Allosteric enzymes ____.
A. have regions that bind with inhibitor or activator molecules B. are associated with important energy-carrying nucleotides C. are not affected by temperature or pH D. have two active sites E. have a broader range of working conditions
Choose the best matching element.
A. Single base-pair mutation B. Translation C. Promoters D. Messenger RNA E. transcription F. Polysome G. RNA polymerase H. Anticodon I. Codon
Two organisms, AABBCCDDEE and aabbccddee, are mated to produce an F1 that is self-fertilized. If the capital letters represent dominant, independently assorting alleles. How many different genotypes will occur in the F2?
A) 243 B) 1024 C) 64 D) 32 E) 25