TLS Online TPP Program

#Question id: 10892


Considering environment and ecosystem, identify the INCORRECT statement

#10. Ecological Principles
  1. In detrital food chain, it is very difficult to measure the energy flow although the use of radioactive tracers give some idea about the energy flow
  2. The change in species composition, community structure and function over time is ecological succession
  3. The slower rise of environmental temperature may be attributed to the increase in pollution in environment which reflects enough solar energy back to other spacer to slow down global warming
  4. Photoperiodism has no relation with the environment and ecosystem, rather it is a biological event taking place in every plant
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TLS Online TPP Program

#Question id: 5752

#8. Inheritance Biology

base change that changes a codon for an amino acid to a stop codon

TLS Online TPP Program

#Question id: 5753

#8. Inheritance Biology

A bacterial histidine mutant was plated on minimal medium and a single colony grew. You decide to sequence the histidine biosynthetic gene of the revertant and discover that the original mutation is still present.  This colony must have been able grow due to a

TLS Online TPP Program

#Question id: 5754

#8. Inheritance Biology

A cell is exposed to EMS (a mutagen that causes guanine to mispair with thymine) and allowed to undergo a few rounds of DNA replication.  The mutational event caused by this mutagen will be

TLS Online TPP Program

#Question id: 5755

#8. Inheritance Biology

A researcher studying bacterial toxin predicts that a lysine within the toxin is important for binding it’s target cell.  She used site-directed mutagenesis to change a codon for lysine (AAA) to one for asparagine (AAU).  However, the mutant toxin still binds to its target cell just as well as the wild-type toxin bound and appears to have no other changes. This type of mutation is probably

TLS Online TPP Program

#Question id: 5756

#8. Inheritance Biology

Type of mutation caused by an addition or deletion of a base in a polypeptide-encoding part of a gene

TLS Online TPP Program

#Question id: 5758

#8. Inheritance Biology

Consider a species with a diploid (2n) number of 28 chromosomes. How many chromosomes would be found in a monoploid body cell?