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TLS Online TPP Program

#Question id: 678

Which is not true about β-sheets?

#SCPH06 I Botany

  1. The side-chains of all amino acids point to the same side of the sheet.

  2. The polypeptide chains in the sheet are nearly fully extended.

  3. The range of allowed phi and psi angles is broader than for those in the α-helix.

  4. In antiparallel sheets the hydrogen bonds between adjacent strands are nearly perpendicular to the backbones of the strands.

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TLS Online TPP Program

#Question id: 12571

#SCPH06 I Botany

Although extinction is a natural process, current extinctions are of concern to environmentalists because
TLS Online TPP Program

#Question id: 5033

#SCPH06 I Botany

Which of the following statements is correct in regard to Homo erectus?
TLS Online TPP Program

#Question id: 768

#SCPH01 Biochemistry

MicroRNAs are important gene regulators, but the miRNAs are also regulated in turn by other RNAs. Which, if any, of the following classes of RNA are not known to contain RNAs that regulate miRNAs?
TLS Online TPP Program

#Question id: 346

#SCPH05 I Biotechnology

The partial negative charge in a molecule of water occurs because ________.
TLS Online TPP Program

#Question id: 40

#SCPH01 Biochemistry

Given that the standard free-energy change for the reaction glucose + Pi → glucose 6-phosphate is 13.8 kJ/mol, and the standard free-energy change for the reaction ATP → ADP + Pi is −30.5 kJ/mol, what is the free-energy change for the reaction glucose + ATP → glucose 6-phosphate + ADP?