Which structure gives rise to the brain and spinal cord?
a. primitive streak
b. neural tube
c. notochord
d. pharyngeal arches
e. somites
ANSWER: b
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Which of the following is nota mechanism for regulating gene expression before the mature RNA transcript is produced?
A. mRNA splicing B. protein degradation C. attenuation of transcription elongation D. modification of mRNA termini
Several different researchers all contributed to the study of the structure of DNA. For each of the following researchers, match their contribution.
A. Rosalind Franklin B. Frederick Griffith C. Oswald Avery D. Erwin Chargaff
Transcription factors _____
A) regulate the synthesis of DNA in response to a signal B) transcribe ATP into cAMP C) control gene expression D) regulate the synthesis of lipids in the cytoplasm
Many cell functions involve communication between cells via molecular signals that must be sent from one cell to be received by a target cell. Suppose the signal to be sent is a small protein. Where would you expect to find the protein in the Golgi?
A) It would be an integral membrane protein with its functional domain on the cytoplasmic side of the membrane. B) It would be an integral membrane protein with its functional domain on the lumen side of the membrane. C) It would be on the exterior of the Golgi. D) It would be in the lumen of the Golgi.