Which special property of Taq polymerases make them useful for PCR?
a. they are stable at high temperatures
b. their hydrogen bonds do not break at low pHs
c. they multiply quickly
d. they are easy to isolate from common fungi
e. they paste two DNA fragments together
ANSWER: a
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Multiple lines of evidence indicate that complex multicellularity has evolved at least six different times. Which of the following superkingdoms include organisms that exhibit complex multicellularity?
A. Opisthokonta, Archaeplastida, Stramenopila B. Opisthokonta, Amoebozoa, Archaeplastida, Stramenopila C. plants, animals, fungi, slime molds D. plants, animals, fungi, slime molds, red algae, green algae, brown algae E. green algae (and land plants), red algae, brown algae, animals, fungi, slime molds
Vacuoles are ________
A) membranous sacs B) manufactured by ribosomes C) composed of microtubules D) found only in plant cells
The coupling of Monoiodotyrosine(MIT) and Diiodotyrosine(DIT) of the thyroglobulin takes place on
a) Free MIT and DIT molecules in the Lumen b) Free MIT and DIT Molecules in the follicular cells c) MIT and DIT molecules part of the thyroglobulin in the follicular lumen d) MIT and DIT molecules part of the thyroglobulin in the follicle cell e) All of the above
Which microscope is used primarily to view unstained spirochetes?
A. Phase contrast microscope B. Dark field microscope C. Electron microscope D. Bright field microscope E. Fluorescence microscope