SCI 115 MIDTERM EXAM: CHAPTERS 1–9

QUESTION 1

  1. ​The plasma membrane is composed mostly of ____.
a. ​phospholipids
b. ​cholesterol
c. ​triglycerides
d. ​steroids
e. ​sphingolipids

5 points   

QUESTION 2

  1. When chlorophyll absorbs light energy, ____.
a. chlorophyll is converted to carotene
b. the molecules begin to move more rapidly
c. the plant becomes radioactive
d. electrons jump to a higher energy level
e. the molecules become ionized

5 points   

QUESTION 3

  1. In eukaryotes, DNA is transcribed in the _____.​
a. ​mitochondria
b. ​cytoplasm
c. ​ribosomes
d. ​nucleus
e. ​endoplasmic reticulum

5 points   

QUESTION 4

  1. New alleles arise by _____.​
a. ​crossing over
b. ​mutation
c. ​independent assortment
d. ​sexual reproduction
e. ​asexual reproduction

5 points   

QUESTION 5

  1. Mutations in genes that control _____ are likely to cause cancer.​
a. ​phenotype expression
b. ​metabolism
c. ​ribosomal proteins
d. ​cell cycle checkpoints
e. ​telomere shortening

5 points   

QUESTION 6

  1. Cells with two of each kind of chromosome are _____.​
a. ​aneuploid
b. ​diploid
c. ​triploid
d. ​haploid
e. ​tetraploid

5 points   

QUESTION 7

  1. How many nucleotides comprise one codon?​
a. ​2
b. ​3
c. ​5
d. ​6
e. ​16

5 points   

QUESTION 8

  1. ​Which organelle functions in the recapture of energy from organic compounds?
a. ​Golgi body
b. ​mitochondria
c. ​lysosome
d. ​ribosome
e. ​endoplasmic reticulum

5 points   

QUESTION 9

  1. The nucleus of an atom contains ____.​
a. ​protons only
b. ​electrons only
c. ​neutrons only
d. ​protons and neutrons
e. protons and electrons

5 points   

QUESTION 10

  1. Glycolysis converts glucose into ____.
a. pigments
b. organic compounds
c. proteins
d. electrons and protons
e. heat energy

5 points   

QUESTION 11

  1. A parent cell with 12 chromosomes will produce daughter cells with _____ chromosomes by mitosis.​
a. ​48
b. ​24
c. ​12
d. ​6
e. ​3

5 points   

QUESTION 12

  1. The products of light-dependent reactions of photosynthesis are ____.
a. used in light-independent reactions
b. complex carbohydrates and proteins
c. stored in the vacuoles of the cell
d. oxygen and glucose
e. used in the light-independent reactions and stored in the vacuoles of the cell

5 points   

QUESTION 13

  1. ​If a protein or molecule is taken up by the cell and must be digested, to which cellular structure is it sent?
a. ​the mitochondria
b. ​the lysosome
c. ​the rough endoplasmic reticulum
d. ​the smooth endoplasmic reticulum
e. ​the Golgi body

5 points   

QUESTION 14

  1. The harvesting of energy from glucose to make ATP happens during ____.
a. glycolysis
b. photosynthesis
c. cellular respiration
d. fermentation
e. chemosynthesis

5 points   

QUESTION 15

  1. When viewing a cell culture under a microscope, most cells would be in which phase of cell cycle?​
a. ​telophase
b. ​interphase
c. ​metaphase
d. ​cytokinesis
e. ​prophase

5 points   

QUESTION 16

  1. Each DNA strand serves as a _____during DNA synthesis.
a. ​replicate
b. ​substitute
c. ​template
d. ​source of nucleotides
e. ​primer

5 points   

QUESTION 17

  1. The chemical reactions that cells use to acquire and use energy to live, grow, and reproduce are called ____.
a. hydrolysis
b. condensation
c. phosphorylation
d. metabolism
e. oxidation

5 points   

QUESTION 18

  1. The structure of a DNA molecule is analogous to a _____.​
a. ​paper clip
b. ​ladder
c. ​fork
d. ​rope
e. ​coiled spring

5 points   

QUESTION 19

  1. Meiosis produces _____.​
a. ​sperm cells
b. ​egg cells
c. ​body cells
d. ​sperm and egg cells
e. ​sperm, egg, and body cells

5 points   

QUESTION 20

  1. ​A series of enzyme-mediated reactions by which cells build, remodel, or break down organic molecules is known as ____.
a. ​energy carriers
b. ​metabolic pathways
c. ​the induced-fit model
d. ​intermediary compounds
e. ​activation

 

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