Biology 241 – Lecture
Chapter 3 (Cellular Level of Organization)
Practice Quiz
I. Circle the letter preceding the one best answer to each of the following questions:
1. The organelle that carries out the process of autophagy during which old organelles are digested so that their
components can be recycled is the
A. Golgi
B. Mitochondrion
C. Centrosome
D. Lysosome
E. Endoplasmic reticulum
2. Choose the FALSE statement about protein synthesis:
A. Translation occurs in the cytoplasm.
B. mRNA picks up / transports amino acids for sequencing.
C. mRNA travels to a ribosome in the cytoplasm.
D. tRNA’s anticodon is attracted to mRNA’s codon.
3. All of the following structures are part of the nucleus except:
A. Nucleolus
B. Chromatin
C. Chromosomes
D. Centrosome
4. Choose the FALSE statement about genes:
A. Genes contain DNA.
B. Genes are transcribed via mRNA during the first step of protein synthesis
C. Every human body cell has a total of 46 genes. D. Genes contain information that controls heredity.
5. Which term refers to increase in size of a tissue related to increase in number of cells:
A. Anaplasia
B. Hypertrophy
C. Hyperplasia
D. Dysplasia
6. Choose the one FALSE statement:
A. Cristae are folds of membrane in mitochondria.
B. Crenation is a term that means bursting of red blood cells when they are placed in a hypotonic solution.
C. Plasma and interstitial fluid are both extracellular fluids.
D. Microtubules are components of the structure of flagella, cilia, centrioles, and the mitotic spindle.
II. Circle T (True) or F (False). If the statement is false, cross out the word(s) that make it false and
write in an appropriate correction so that the statement now becomes a true statement.
T F 7. Pre-mRNA differs from mature-mRNA in that pre-mRNA consists only of introns.
T F 8. A 5% glucose solution is hypotonic to a 15% glucose solution.
III. Using the blanks provided, fill in the word or phrase that best fits the description given:
_____________________________9.
___________________________
____________________________10.
____________________________11.
These are the two types of molecules which are most numerous in the
plasmalemma (a cell’s outer membrane).
Cytokinesis can also be described by this short phrase.
This is the molecule that when split provides the energy necessary for
processes involved in movement of substances across cell membranes
that require energy.
____________________________12. White blood cells engulf large solid particles by this process.
____________________________13. This is the sequence of mRNA bases that would be complementary to
the DNA base sequence of A-T-T-C-A-G.
IV. Arrange the answers in correct sequence:
_____, _____, _____ 14. After prophase, stage in mitosis are: A. Anaphase B. Metaphase C. Telophase
_____, _____, _____ 15. Steps in protein synthesis are: A. Formation of peptide bonds connecting amino acids
B. Translation C. Transcription