TLS Online TPP Program

#Question id: 4747


How does incomplete dominance differ from incomplete penetrance?

#Section 3: Genetics, Cellular and Molecular Biology
  1. Incomplete dominance refers to alleles at the same locus; incomplete penetrance refers to alleles at different loci.

  2. Incomplete dominance ranges from 0% to 50%; incomplete penetance ranges from 51% to 99%.

  3. In incomplete dominance, the heterozygote is intermediate to the homozygotes; in incomplete penetrance, heterozygotes express phenotypes of both homozygotes.

  4. In incomplete dominance, the heterozygote is intermediate to the homozygotes; in incomplete penetrance, some individuals do not express the expected phenotype

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TLS Online TPP Program

#Question id: 538

#Section 4: Fundamentals of Biological Engineering

Which of the following statements are correct about cells that form ATP mainly by glycolysis are

A) anaerobic yeasts.

B) lactic acid bacteria.

C) kidney medulla cells.

TLS Online TPP Program

#Question id: 540

#Section 4: Fundamentals of Biological Engineering

During strenuous exercise, the NADH formed in the glyceraldehyde 3-phosphate dehydrogenase reaction in skeletal muscle must be reoxidized to NAD+ if glycolysis is to continue.  The most important reaction involved in the reoxidation of NADH is:

TLS Online TPP Program

#Question id: 541

#Section 4: Fundamentals of Biological Engineering

The overall △G for glycolysis is -72 kJ/mol in erythrocytes. Which statement below is true?

A) The value of △G0ʹ is also -72 kJ/mol since the cytosol pH is close to 7.

B) The free energy of glycolysis is found as the sum of the standard free energy changes for

the individual pathway reactions.

C) The negative sign of △G shows that this pathway will proceed toward product (pyruvate) under normal cellular conditions.

TLS Online TPP Program

#Question id: 542

#Section 4: Fundamentals of Biological Engineering

Hamsters love to run on exercise wheels. Prolonged running at a high rate of speed requires ATP. Could a hamster with a defective gene for the enzyme lactate dehydrogenase meet the extra ATP demand for prolonged, fast wheel-running by maintaining a high rate of glycolysis? Why or why not?

TLS Online TPP Program

#Question id: 543

#Section 4: Fundamentals of Biological Engineering

If glucose labeled with 14C at C-1 (the aldehyde carbon) were metabolized in the liver, the first radioactive pyruvate formed would be labeled in:

TLS Online TPP Program

#Question id: 544

#Section 2: General Biology

One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditions of zinc deficiency, when the enzyme may lack zinc, it would be referred to as the: