Practice Questions

TLS Online TPP Program

#Question id: 409

For the following reaction,DG'° = +29.7 kJ/mol. L-Malate + NAD+ -> oxaloacetate + NADH + H+ The reaction as written:

#Section 2: General Biology

can never occur in a cell.
can occur in a cell only if it is coupled to another reaction for which DG'°is positive.
can occur only in a cell in which NADH is converted to NAD+ by electron transport.
may occur in cells at some concentrations of substrate and product.

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TLS Online TPP Program

#Question id: 8921

#Section 6: Plant, Animal and Microbial Biotechnology

Evidence of which structure or characteristic would be most surprising to find among fossils of the Ediacaran fauna?

TLS Online TPP Program

#Question id: 8922

#Section 6: Plant, Animal and Microbial Biotechnology

Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships?

TLS Online TPP Program

#Question id: 8923

#Section 6: Plant, Animal and Microbial Biotechnology

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

TLS Online TPP Program

#Question id: 8924

#Section 6: Plant, Animal and Microbial Biotechnology

Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent?

1. Protostomes invade terrestrial environments.

2. Cambrian explosion occurs.

3. Deuterostomes invade terrestrial environments.

4. Vertebrates become top predators in the seas.

TLS Online TPP Program

#Question id: 8925

#Section 6: Plant, Animal and Microbial Biotechnology

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?

3. deuterostomes

TLS Online TPP Program

#Question id: 8927

#Section 6: Plant, Animal and Microbial Biotechnology

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that