Marsha has developed a contact dermatitis on her face, neck, and arms. she has developed such reactions in the past but has been unable to identify the causative agent. she now goes to see the dermatologist for allergy testing. a patch test is done. a patch test is performed by:

Explain why phospholipid molecules form a bilayer. (3 marks)

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.