BIOLOGY

18. Inthe following chemical reaction, what is carbon dioxide (CO2)?

12 H20 + 6 CO2 = 1 glucose molecule + 6 O2

A. substrate

B. product

C. enzyme

D. activation factor

E. independent variable

 

19. The bond in which two atoms share one or more pairs of electrons is a_________ bond.

  1. Polar
  2. Hydrogen
  3. Ionic
  4. Covalent

 

20. Which of the following terms includes all of the chemical reactions that occur within a cell?

  1. Cellular respiration
  2. Catabolism
  3. Redox reactions
  4. Metabolism
  5. Phosphorylation

 

21. Within a cell, energy released by electrons is often used to phosphorylate which of the following molecules?

  1. ADP
  2. ATP
  3. Pyruvate ions
  4. Oxygen
  5. NAD

 

22. All of the following apply to glycolysis except

  1. Occurs without oxygen
  2. Degrades glucose to H2O and CO2
  3. Ends with formation of pyruvic acid
  4. Occurs during fermentation

 

23. In which of the phases of cellular respiration is the majority of ATP formed?

  1. Processing of pyruvic acid for the Krebs cycle
  2. Electron transport chain
  3. Glycolysis
  4. The Krebs cycle
  5. All phases produce the same number of ATP molecules

 

24. The energy of the sun is converted into usable energy for the cell in the form of _________.

  1. ADP
  2. ATP
  3. Glucose
  4. CO2

 

25. The starting materials of photosynthesis are _____________

  1. Oxygen and glucose
  2. Carbon dioxide and oxygen
  3. Carbon dioxide and water
  4. Oxygen and water

 

26. What type of macro-molecule is frequently an enzyme?

  1. Carbohydrate
  2. Nucleic acid
  3. Lipid
  4. Protein

 

27. What function do enzymes perform?

  1. Increase substrate concentration
  2. Increase the temperature
  3. Increase the activation energy required for a reaction to occur
  4. Decrease the activation energy required for a reaction to occur

 

28. The most important aspect of cellular respiration is that ___________________

  1. It is the process that occurs only in animal cells
  2. It is the process that utilizes fat as its primary energy source
  3. It is the process that enables living organisms to utilize the energy stored in glucose
  4. It is the only cellular process that yields ATP

 

29. The statement best describes the relationship between plants and animals on earth is

  1. Plants produce O2 and sugars from CO2
  2. Animals produce CO2 and H2O from sugars and O2
  3. Plants produce O2 and sugars and animals produce CO2 and H2O
  4. Animals produce O2 and sugars and plants produce CO2 and H2O

 

30. What is the function of the ribosome?

  1. Digestion
  2. RNA duplication
  3. Mobility
  4. Protein synthesis

 

31. What is the function of the lysosome?

  1. Prokaryotic digestion
  2. Eukaryotic digestion
  3. Prokaryotic mobility
  4. Eukaryotic mobility

 

32. In what stage of the cell cycle is genetic content replicated?

  1. Interphase
  2. Prophase
  3. Metaphase
  4. Anaphase
  5. Telophase

 

33. How many chromatids comprise a duplicated chromosome?

  1. One
  2. Two
  3. Three
  4. Four

 

34. Which of the following could not be a sequence of RNA?

  1. GCGUUU
  2. UAUGCG
  3. ATGCGT
  4. AUGCGU
  5. AAACUG

 

35. The product of meiosis includes which of the following?

  1. Haploid cells
  2. Genetically unique cells
  3. Four daughter cells
  4. All of the above
  5. A. and C. only

 

36. Often referred to as the Central Dogma, identify the traditional sequence of protein synthesis.

  1. DNA->RNA->Protein
  2. RNA->DNA->Protein
  3. Protein->RNA->DNA
  4. Protein->DNA->RNA

 

37. In humans, the allele for dimples (D) is dominant. The allele for not having dimples (d) is recessive. If a woman (DD) and a man (Dd) have four children, how many of the children will not have dimples?

  1. 0
  2. 1
  3. 2
  4. 3
  5. 4

 

38. Which of the following variations could be subject to natural selection?

  1. A dog with short legs due to malnutrition is able to crawl into holes better than his litter mates.
  2. A tree is not infested by a ground-dwelloing beetle when the homeowener cuts the lower branches.
  3. A hyena is born with a spotted fur pattern that allows it to hide in the grass better than his litter mates.
  4. A pigeon learns that’s when its keeper comes near, it will be fed.
  5. All of these variations may be acted on by natural selection.

 

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