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TLS Online TPP Program

#Question id: 7002

The nematode Caenorhabditis elegans ________.

#SCPH28 | Zoology
  1. is composed of about 1,000 cells, in which the developmental origin of each cell has been mapped
  2. has only a single chromosome, which has been fully sequenced
  3. has about 1,000 genes, each of which has been fully sequenced
  4. uniquely, among animals, utilizes programmed cell death during normal development
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TLS Online TPP Program

#Question id: 5749

#SCPH28 | Zoology

Type of mutation in which a pyrimidine is substituted for a purine
TLS Online TPP Program

#Question id: 357

#SCPH06 I Botany

What is the concentration of H+ in a solution of 0.1 M NaOH?
TLS Online TPP Program

#Question id: 3435

#SCPH28 | Zoology

You turn on a light and observe cockroaches scurrying to dark hiding places. What have you observed?
TLS Online TPP Program

#Question id: 1391

#SCPH06 I Botany

If an adult person has a faulty version of the human analog to ced-4 of the nematode, which of the following is most likely to result?
TLS Online TPP Program

#Question id: 13103

#SCPH28 | Zoology

With the help of DNA fingerprinting which can be used to determine paternity. There are three babies (Baby A, Baby B and Baby C) in a maternity ward, and three sets of confused and worried parents. (Father and Mother #1 are a couple, as are Father and Mother #2, and Father and Mother #3.) 
You do each PCR reaction and load each one into a separate well of an agarose gel, and then run the gel.
 
 

Why is it that some people show only one band?