Practice Questions

TLS Online TPP Program

#Question id: 10229

Comparing such a plot for C3 and C4 plants reveals differences between the two pathways of carbon metabolism, which of the following given statements will be incorrect?

#Unit 6. System Physiology – Plant

In C4 plants, photosynthetic rates saturate at ci values of about 100–200 ppm, reflecting the effective CO2- concentrating mechanisms operating in these plants
In C3 plants, increasing ci levels continue to stimulate photosynthesis over a much shorter CO2 range than for C4 plants
In C4 plants, the CO2 compensation point is zero or nearly zero, reflecting their very low levels of photorespiration
In C3 plants, the CO2 compensation point is about 50–100 ppm at 25°C, reflecting CO2 production because of photorespiration

More Questions

TLS Online TPP Program

#Question id: 5647

#Unit 5. Developmental Biology

Use the following information to answer the question. In order to test how sea urchin sperm bind to eggs, scientists isolated the egg receptor protein

that binds to the sperm acrosomal protein called bindin. Plastic beads were coated with egg receptor for bindin (ERB1) from eggs of the sea urchin Strongylocentrotus purpuratus, and then the beads mixed with sperm from S. purpuratus or from the related species, S. franciscanus. The researchers counted how many sperm were bound to each bead. The results are shown in the graph below. Treatments:

A: S. purpuratus sperm mixed with S. purpuratus ERB1 beads

B: S. purpuratus sperm mixed with beads containing no ERB1 protein

C: S. franciscanus sperm mixed with S. purpuratus ERB1 beads

D: S. franciscanus sperm mixed with beads containing no ERB1 protein

Based on the data in the graph, which of the following conclusions is supported?

TLS Online TPP Program

#Question id: 28678

#Unit 2. Cellular Organization

Lamin B is phosphorylated and causes depolymerization of the lamin intermediate filaments, which factor involve to the phosphorylation of lamins?

a) protein kinase B

b) protein kinase C

c) mitotic CDKs