Answer the following questions:

a. Where must protein and peptide hormones bind to receptors?
b. Where can steroid hormones can bind to cells?


a. at the cell surface
b. within the cell

Biology & Microbiology

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The movement of xylem sap is best described from ____ to ____

a. the shoot system; the root system b. sinks; sources c. the root system; the shoot system d. sources; sinks e. none of these

Biology & Microbiology

Both pulse-field gel electrophoresis and Western blotting utilize electrophoresis in their procedures.  When comparing the two procedures, which statement is true?

A. Pulse-field gel electrophoresis is excellent for identifying minute genetic differences among strains of one species of an organism. B. Pulse-field gel electrophoresis separates DNA fragments while Western blotting separates proteins. C. The presence of antibodies in a patient specimen can be identified in the Western Blot. D. Pulse-field gel electrophoresis is used for genetic analysis. E. All of the statements are true.

Biology & Microbiology

Which of the following is in the correct sequential order?

a) A tadpole is cloned, a better breed of corn is created through artificial selection, a test tube baby is born, Dolly is born b) A better breed of corn is created through artificial selection, a tadpole is cloned, a test tube baby is born, Dolly is born c) A better breed of corn is created through artificial selection, a test tube baby is born, a tadpole is cloned, Dolly is born d) All of the above

Biology & Microbiology

Which of the following sequence pairs is a palindrome?

A. 5?-TCACGT-3? 3?-TCACGT-5? B. 5?-GTTCAT-3? 3?-CAAGTA-5? C. 5?-TCCGGA-3? 3?-AGGCCT-5? D. 5?-GAATCG-3? 3?-CTTAGC-5? E. None of the paired sequences are a palindrome.

Biology & Microbiology