Practice Questions

TLS Online TPP Program

#Question id: 4947

The first genes on Earth were probably

#Unit 11. Evolution and Behavior

DNA produced by reverse transcriptase from abiotically produced RNA.
DNA molecules whose information was transcribed to RNA and later translated in polypeptides.
auto-catalytic RNA molecules.
RNA produced by autocatalytic, proteinaceous enzymes.

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TLS Online TPP Program

#Question id: 31247

#Unit 5. Developmental Biology

Achondroplasia is caused by base-pair substitution mutation that converts:

TLS Online TPP Program

#Question id: 19101

#Unit 4. Cell Communication and Cell Signaling

which are specialized bacteria that are obligate parasites of the phloem tissue?

TLS Online TPP Program

#Question id: 2848

#Unit 2. Cellular Organization

Select the answer that names the three functional elements that are required for replication and stable inheritance of chromosomes

TLS Online TPP Program

#Question id: 26550

#Unit 3. Fundamental Processes

Choose which of the following statement is correct

a. Ribosomes PTC do not remove EJC

b. Stalled EJC recruits Upf

c. Upf recruits 5’-3’ decapping & 3’-5’ deadynylation

d. Finally mRNA is decayed in NMD process

TLS Online TPP Program

#Question id: 12552

#Unit 10. Ecological Principles

To measure the population of lake trout in a 250 hectare lake, 200 individuals were netted and marked with a fin clip, and then returned to the lake. The next week, the lake is netted again, and out of the 200 lake trout that are caught, 50 have fin clips. Using the capture-recapture estimate, the lake trout population size could be closest to which of the following?