Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 5952
TLS Online TPP Program

#Question id: 7152

The size of a cell is generally controlled by the amount of DNA in the nucleus: the more DNA, the larger the cell. What do experiments in which the amount of DNA is doubled (tetraploidy in salamanders) tell us about growth control?

#Unit 5. Developmental Biology
  1. The animals grow to a normal size, and contain only half as many cells, indicating that growth is regulated at the level of absolute size, rather than cell number.
  2. The animals grow to twice the normal size, indicating that growth is regulated at the level of the number of cells present.
  3. The animals end up with cells that are twice as big, but only half as many, resulting in an animal that is half its normal size, indicating that the number of cells is the critical determinant of growth.
  4. The animals grow to a normal size, and contain only half as many cells, indicating that growth is regulated by the total amount of DNA present in an organism.
More Questions
TLS Online TPP Program

#Question id: 208

#Unit 1. Molecules and their Interaction Relevant to Biology

The structure shown below is which coenzyme? 
TLS Online TPP Program

#Question id: 209

#Unit 1. Molecules and their Interaction Relevant to Biology

TPP is a/an ________ of yeast pyruvate decarboxylase.
TLS Online TPP Program

#Question id: 210

#Unit 1. Molecules and their Interaction Relevant to Biology

Enzymes with vitamin B6 as the prosthetic group catalyze a variety of reactions involving 
TLS Online TPP Program

#Question id: 211

#Unit 1. Molecules and their Interaction Relevant to Biology

The degradation of aspartic acid to oxaloacetic acid and NH4+ is catalyzed by an enzyme with ________ as its prosthetic group.
TLS Online TPP Program

#Question id: 212

#Unit 1. Molecules and their Interaction Relevant to Biology

Which functional group is shown below?
TLS Online TPP Program

#Question id: 213

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acid can form a covalent bond to the coenzyme pyridoxal phosphate?