Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 464
TLS Online TPP Program

#Question id: 482

Inorganic fluoride inhibits enolase.  In an anaerobic system that is metabolizing glucose as a substrate, which of the following compounds would you expect to increase in concentration following the addition of fluoride?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. 2-phosphoglycerate

  2. Glucose

  3. Glyoxylate

  4. Phosphoenolpyruvate

More Questions
TLS Online TPP Program

#Question id: 15667

#Unit 8. Inheritance Biology

You set up the following dihybrid mapping cross in fruit flies. 
P e+e+ roro cq cq x ee ro+ro+ cq+cq+. After backcrossing F1 males to ee roro cq cq females, you get the following results: gray body, rough eyes, claret eyes 576; ebony body, smooth, red eyes 564. How can you explain this result?
TLS Online TPP Program

#Question id: 29102

#Unit 8. Inheritance Biology

In mice Igf2 gene which encodes a protein called insulin like growth factor II (Igf2). Offspring inherit one Igf2 allele from their mother and one from their father The paternal copy of Igf2 is actively expressed in the fetus, but the maternal copy is not expressed. which of the following is correct about this gene?

a) this is an example of genomic imprinting and showing maternal imprinted

b) this is an example of genomic imprinting and showing paternal imprinted

c) mechanism of imprinting is due to the addition of methyl (CH3) groups to DNA nucleotides

d) mechanism of imprinting is due to changing the nucleotide sequences
TLS Online TPP Program

#Question id: 5218

#Unit 11. Evolution and Behavior

Several of the different globin genes are expressed in humans, but at different times in development. What mechanism could allow for this?
TLS Online TPP Program

#Question id: 1974

#Unit 4. Cell Communication and Cell Signaling

A person exposed to a new cold virus would not feel better for one to two weeks because
TLS Online TPP Program

#Question id: 13144

#Unit 8. Inheritance Biology

Shell coiling of the snail Limnaea peregra(genetic maternal effect)  the shell coils (s+s+) which is termed dextral coiling, while some snails exhibiting sinistral coiling (ss). The allele for dextral (s +) is dominant over the allele for sinistral (s). If a male homozygous for dextral alleles (s+s+) is crossed with a female homozygous for sinistral alleles (ss) all of the F1 are heterozygous (s+s) and have a sinistral shell. If these F1 snails are self-fertilized, what is the phenotype of the F2 snail?