Regulation by gradients of paracrine factor concentration was elegantly demonstrated by the specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observations are correct from this graph?

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#Question id: 8923

#SCPH06 I Botany

Which of these genetic processes may be most helpful in accounting for the Cambrian explosion?

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#Question id: 2678

#SCPH06 I Botany

Insertional inactivation of the lacZ gene on a plasmid can be used to screen for recombinants on a plate containing:

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#Question id: 391

#SCPH05 I Biotechnology

In a hospital laboratory, a 10.0 mL sample of gastric juice, obtained several hours after a meal, was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient’s stomach contained no ingested food or drink, thus assume that no buffers were present. What was the pH of the gastric juice?

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#Question id: 12725

#SCPH28 | Zoology

Match the following

DNA form	Helix Direction	Number of bases per helix turn
1. B	a. Left Handed	i. 10
2.  A	b. Right Handed	ii. 12
3.  C	c. Left Handed	iii. 14
4. Z	d. Right Handed	iv. 9

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#Question id: 14291

#SCPH05 I Biotechnology

In a batch sterilization process if  overall,  heating &  cooling are 32.2, 9.8 & 10.1 respectively, THEN the holding time at 121^^o-C of the process is (given that the specific death rate (k) of microorganisms at 121^^o-C is 2.54 min-1 ):