__________ type of biosensors exist to measure the concentration and location of Ca2+ and the activation state of GTPase switch proteins.

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#Question id: 15249

#Unit 2. Cellular Organization

Halophiles have adapted so completely to ____________ conditions that they require high levels of ___________ to grow.

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#Question id: 4890

#Unit 8. Inheritance Biology

A strain of Neurospora crassa, unable to synthesize the vitamin thiamine (t), is crossed with a strain that cannot synthesize the amino acid arginine (a). What information can be obtained from the resultant frequencies of ascospore patterns?

 A) The two loci (a) and (t) are independent assortment of each other

B) Both genes are closely linked to their respective centromeres.

C) no crossovers occurred between either gene and its centromere.

D) These two gene may reside on different chromosomes.

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#Question id: 34170

#Unit 3. Fundamental Processes

What is correct about Klenow fragment

A. is a single polypeptide of 103 kD

B. larger cleavage product of DNA Pol I of 68 kD

C. It contains the polymerase activity

D. It contains the 3’-5’ exonuclease activity

E. It contains the 5’-3’ exonuclease activity

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#Question id: 5083

#Unit 5. Developmental Biology

Which of the following correctly displays the sequence of developmental milestones?

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#Question id: 2310

#Unit 2. Cellular Organization

The nucleus is surrounded by