FREE FINAL Q’s Flashcards
(29 cards)
The best experimental design _____
D) includes a large sample size and a control, and alters only one condition between the controls and the experimental condition
Which of the following best describes a model organism?
B) It is well studied, it is easy to grow, and results are widely applicable.
Which of the following can be attributed to water’s high specific heat?
B) A lake heats up more slowly than the air around it.
Which of the following effects can occur because of the high surface tension of water?
B) A raft spider can walk across the surface of a small pond.
The molecular formula for glucose is C6H12O6. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?
B) C18H32O16
How do phospholipids interact with water molecules?
C) The polar heads interact with water; the nonpolar tails do not.
What component of amino acid structure varies among different amino acids?
C) the components of the R-group
Which of the following is the strongest evidence that protein structure and function are correlated?
D) Denatured (unfolded) proteins do not function normally.
The tertiary structure of a protein is the _____
B) unique three-dimensional shape of the fully folded polypeptide
Which of the following descriptions best fits the class of molecules known as nucleotides?
C) a nitrogenous base, a phosphate group, and a sugar
If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?
B) 40
Cell size is limited by _____
C) surface to volume ratios
What are the two forms of lipids which can be seen in the plasma membrane of a cell?
B) phospholipids and cholesterol
Which structure is common to plant and animal cells?
C) mitochondrion
Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
C) proteins
Which organelle often takes up much of the volume of a plant cell?
B) vacuole
Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle must be involved in this condition?
C) the lysosome
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
C) ER → Golgi → vesicles that fuse with plasma membrane
Which organelle is the primary site of ATP synthesis in eukaryotic cells?
B) mitochondrion
Plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells?
B) gap junctions
The evolution of eukaryotic cells most likely involved _____
A) endosymbiosis of an aerobic bacterium in a larger host cell—the endosymbiont evolved into mitochondria
What were researchers missing when they attempted to explain how vesicular transport occurs in cells?
D) motor proteins
Which of the following most accurately describes selective permeability?
D) Only certain molecules can cross a cell membrane.
Diffusion _____
C) is a passive process in which molecules move from a region of higher concentration to a region of lower concentration
