Identify the principal role of cellular respiration.
A. To convert the chemical energy of sugars into heat to maintain an elevated body temperature
B. To convert kinetic energy into the chemical energy of sugars
C. To convert solar energy into the chemical energy of sugars
D. To convert the chemical energy of sugars into the chemical energy that fuels life's processes
Answer: D
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Red-green color blindness is a sex-linked recessive trait in humans. If a non-carrier female (homozygous for the nonmutant allele) mated with an affected man, what would be the expected outcome(s)?
A. None of the sons would be affected. B. Half the sons would be color blind. C. None of the daughters would be affected. D. None of the offspring (sons or daughters) would be color blind. E. Half of the sons would be color blind, and none of the daughters would be color blind.
Molecules that are involved in the regulation of gene expression, which are usually comprised of proteins?
(A) translation factors (B) RNA polymerase (C) RNA codons (D) transcription factors
Bat wings are a complex adaptation for flight that apparently arose fairly quickly in evolutionary history. Which of the following statements regarding bat wing evolution is false?
A. bat wings are a complex adaptation for flight that apparently arose fairly quickly in the fossil record B. scientists studying bat wing development often focus on proliferation and differentiation of chondrocytes in the growth plate C. bat wing morphology has changed substantially over the last 50 million years D. in experiments where Bmp growth factors were added during development, bat digits grow longer
Proper sequence:
1. Homologous chromosomes are brought into perfect alignment by a protein complex forming tetrad. 2. Chromatids separate and go to opposite poles. 3. Homologous chromosomes separate and go to opposite poles. 4. Chromatids of one homologous chromosome exchange fragments with chromatids of the other chromosome. 5. Pairs of homologous chromosomes line up along the cells equatorial plate.