In humans, where does fertilization occur?
A. in the vagina
B. in the fallopian tubes
C. externally
D. in the ovary
Answer: B
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Which of the following cell types does not move materials through the body of the plant?
A. sclerenchyma B. xylem vessel members C. sieve tube members D. tracheids E. sieve cells
Serial repetition of segments is a defining characteristic of which worm phylum?
A. Roundworms B. Flatworms C. Segmentation is not a defining characteristic of any of the worm phyla. D. Annelids
Non-protein coding genes are typically found in:
A) mitochondria. B) the nucleolus. C) the endoplasmic reticulum. D) the cytoplasm. E) areas of the nucleus other than the nucleolus.
The most notable difference between PrPC (normal protein) and PrPSc (prion protein) is ________.
A. PrPc folds appropriately whereas PrPSc does not fold correctly B. PrPC causes a cell to undergo rapid apoptosis C. PrPC is a much longer polypeptide chain, compared to PrPSc D. PrPc is a functional glycolytic enzyme whereas PrPSc is nonfunctional