Multiple Choice Answers

1. A man that is heterozygous for a certain gene:
a) Produces sperm cells that all have the same allele for this gene.
b)Could not have had a homozygous parent.
c) Can pass one of two possible alleles to his children.
d) All of the above. e)None of the above

2. In the absence of any other types of atoms, Hydrogen and Oxygen atoms can bond to form:
a) sugar
b) protein
c) carbon dioxide
d) water
e) all of the above f)None of the above

3. In the desert, it is dry. Plants close their stomata to conserve water. This results in high levels of oxygen and low levels of carbon dioxide. Rubisco binds with oxygen instead of carbon dioxide. This undercuts or minimizes the efficiency of photosynthesis. This is called phototranspiration. a) True
b) False

4. During the citric acid cycle of respiration, ATP is made in the:
a) Cytoplasm
b) Chlorophyll
c) Golgi Apparatus
d) Mitochondria
e) Chloroplast

5. The most ATP is made in which process: a
) glycolysis
b) citric acid cycle
c) transition step between glycolysis and citric acid cycle
d) electron transport chain

6. In an autosomal recessive condition only individuals with two recessive alleles are affected.
a) True
b) False

7. If one strand of DNA has the base sequence AAGCAA, the complementary strand has which of the following sequences?
a) UUCGUU
b) UUTAUU
c) TTCGTT
d) AAGCAA
e) TTACTT

8. Consider a simple example of human eye color. Suppose that the allele B results in brown and the allele b results in blue. Suppose that the heterozygote Bb has eyes that are a speckled mixture of brown and blue. In this case, the allele B shows _____________ with regard to the allele b:
a) Complete dominance.
b) Codominance.
c) Recessiveness.
d) None of the above

9. Which term is mostly is associated with formation of new skin cells after you have cut yourself (choose the best answer).
a) Meiosis
b) Transcription
c) Mutation
d) Mitosis
e) Endosymbiosis

10. All cells have a plasma membrane.
a) True
b) False

11. __________ can be used to insert genes into human cells.
a) PCR b) Modified viruses
c) Xenotransplantation
d) DNA microarrays

12. An autosomal dominant condition results in heterozygotes being affected.
a) True
b) False

13. The active site of an enzyme:
a) Is not affected by an extreme change in pH or temperature.
b) Reacts with all molecules in a cell.
c) Is the part of the enzyme where its substrate can fit.
d) Is the period of optimal functionality in an enzyme’s life cycle.
e) None of the above

14. Cell size is limited by the surface to volume ratio.
a) True
b) False

15. Vesicles are responsible for:
a) transporting substances
b) storing substances
c) digestion of substances
d) all of the above
e) none of the above

16. Which of the following is incorrect:
a) Catabolism involves degradative reactions and includes cell respiration.
b) Anabolism involves synthetic reactions and includes protein synthesis.
c) Cell respiration produces sugar for energy storage.
d) Photosynthesis involves the use of captured sunlight energy and carbon dioxide.

17. (Choose the false statement) Enzymes:
a) Are made primarily of protein
b) Are found in Eukaryotic cells
c) Speed up chemical reactions
d) Are carbon based
e) Are autotrophic

18. The pyruvic acid made in glycolysis is converted to acetyl-CoA and is used to start the Krebs cycle:
a) True
b) False

19. A functional group imparts predictable and specific chemical properties. Phosphate is a functional group found in _____________ that imparts______________ qualities.
a) fatty acids, nonpolar
b) sugars, polar and reactive
c) amino acids, basic
d) alcohols, polar
e) nucleotides, phospholipids and proteins, high energy polar

20. Archaeans have a more rigid bilayer than bacteria or eukaryotes which help them survive in hostile environments.
a) True
b) False

21. Genes are made up of sequences of… (choose the best answer):
a) peptides
b) chromosomes
c) amino acids
d) nucleotides
e) fatty acids

22. Ribosomal subunits are assembled from proteins and RNA in the _________ but pass through the _______ to the __________ to become active.
a) nucleolus, nuclear envelope, cytoplasm
b) endomembrane system, Golgi, ribosomes
c) nucleus, endoplasmic reticulum, Golgi
d) nucleus, Golgi, ribosomes

23. Sperm are produced in which process:
a) Binary fission
b) Hybridization
c) Meiosis
d) Transcription
e) Mitosis
f) The S phase of the Cell Cycle

24. The primary structure of a folded protein is:
a) held together by Hydrogen bonds
b) an amino acid sequence.
c) determined by coiling and supercoiling.
d) made up of nucleic acids.
e) is a string of glucose molecules.