Practice Questions

TLS Online TPP Program

#Question id: 15121

Which of the following examples would NOT be consistent with a gene dosage effect?

#Unit 8. Inheritance Biology

Males with one normal allele for the X linked gene dystrophin are unaffected, while females (who shut off one of their two X chromosomes) with one normal allele for dystrophin may be mildly affected with muscular dystrophy.
Flower colour in four-o-clocks seems to be incompletely dominant.
In fruit flies, homozygotes for an allele that produces a small amount of functional protein are severely abnormal but survive to adulthood, while homozygotes for an allele that produces no protein at all die as embryos.
In bels Males normal are haploid while females normally are diploid

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TLS Online TPP Program

#Question id: 300

#Unit 1. Molecules and their Interaction Relevant to Biology

Hydrogen bonding occurs in molecules when ___________________.

TLS Online TPP Program

#Question id: 656

#Unit 1. Molecules and their Interaction Relevant to Biology

The ________ is the single shape a protein adopts under physiological conditions.

TLS Online TPP Program

#Question id: 32140

#Unit 1. Molecules and their Interaction Relevant to Biology

Successive base pairs in B-DNA show a mean rotation of

TLS Online TPP Program

#Question id: 4176

#Unit 3. Fundamental Processes

The unambiguity and degeneracy of the genetic code can best be respectively exemplified by which of the following?

TLS Online TPP Program

#Question id: 5632

#Unit 5. Developmental Biology

In the egg,_______ contains proteolytic enzymes that are released by exocytosis after fertilization and are important for preventing polyspermy.