Focus On Life Science: California Grade 7

Unit 1: Cell Biology

Unit Tests

1.
How many ATP molecules are available to a cell during lactic acid fermentation? 1.a
A)6 ATP
B)2 ATP
C)20 ATP
D)36 ATP
2.
_____________ are single-celled organisms that do not have membrane-bound organelles. 5.a
A)Prokaryotes
B)Eukaryotes
C)Amoebas
D)Protists
3.
The human has ______ homologous chromosomes. 1.e
A)billions of
B)46 pairs
C)23 pairs
D)many hundreds of
4.
Which cells remain undifferentiated? 1.f
A)liver cells
B)blood cells
C)cardiac cells
D)stem cells
5.
What contains the genetic information? 1.c, 2.e
A)cell wall
B)central vacuole
C)chromosome
D)cell membrane
6.
Which is found in both plant and animal cells? 1.a, 1.b
A)central vacuole
B)chloroplast
C)cell wall
D)ribosomes
7.
Which cell organelle has its own DNA and can duplicate itself? 1.c
A)cell membrane
B)mitochondria
C)cytoplasm
D)ribosome
8.
What are the copies of a chromosome made during S phase called? 1.e
A)homologous
B)centromeres
C)daughter genes
D)sister chromatids
9.
Which organelle does the cell use for storage? 1.a
A)lysosome
B)chromosome
C)endoplasmic reticulum
D)vacuole
10.
Which is NOT a function of the cell wall? 1.b
A)provide the cell with support
B)regulate what enters the cell
C)give the cell its shape
D)protect the cell
11.
Which process produces ATP without the use of oxygen? 1.a
A)lactic acid fermentation
B)photosynthesis
C)glycolysis
D)cellular respiration
12.
Which organ is part of your lymphatic system? 1.f
A)heart
B)spleen
C)kidney
D)lungs
13.
During what phase of the cell cycle does a cell prepare to reproduce? 1.e
A)prophase
B)anaphase
C)metaphase
D)interphase
14.
In which phase does a new membrane form around each set of chromosomes? 1.e
A)metaphase
B)anaphase
C)telophase
D)prophase
15.
____________ is the process in which cytoplasm divides. 1.e
A)Meiosis
B)Cytokinesis
C)Mitosis
D)Plasmosis
16.
Which is NOT one of the 6 main kinds of atoms that make up the molecules of living things? 1.a
A)sulfur
B)carbon
C)nitrogen
D)lead
17.
Sugar, starch, cellulose, and chitin are all types of __________. 1.a
A)carbohydrates
B)lipids
C)nucleic acids
D)proteins
18.
Which organelle is called the power plant of the cell? 1.d
A)nucleus
B)golgi apparatus
C)mitochondrion
D)ribosome
19.
Of organ system, organ, tissue, and organism, which is the most basic? 1.f
A)organ
B)tissue
C)organ system
D)organism
20.
What substance makes up most of your body's mass? 1.b
A)salt
B)carbon
C)oxygen
D)water
21.
What type of cells do NOT have a nucleus and other membrane-bound organelles? 1.a
A)plant cells
B)eukaryotic cells
C)prokaryotic cells
D)animal cells
22.
Which is a true statement about ribosomes? 1.a
A)Ribosomes are made in the cell membrane.
B)Ribosomes are found on both smooth and rough endoplasmic reticulum.
C)Ribosomes are surrounded by a membrane.
D)Ribosomes build proteins.
23.
During which part of interphase does organelle reproduction occur? 1.e, 1.f
A)S
B)G1
C)G2
D)G3
24.
Which is NOT part of your nervous system? 1.f
A)sensory receptors
B)brain
C)liver
D)spinal cord
25.
Brain cells and nerve cells are _________ to enable them to send and receive signals from many directions. 1.f
A)striated
B)round
C)smooth
D)branched
26.
What is the function of both cilia and flagella? 1.a
A)release energy
B)make food
C)store water
D)movement
27.
Which is NOT a main idea of the cell theory? 1.a
A)An egg contains a miniature version of the adult organism.
B)All new cells come from preexisting cells.
C)The cell is the smallest unit of life.
D)All organisms are made of one or more cells.
28.
What is a difference between the cell membrane and the cell wall? 1.a
A)The cell wall is selectively permeable, but the cell membrane allows substances to pass through freely.
B)The cell membrane is selectively permeable, but the cell wall allows substances to pass through freely.
C)The cell wall is found only in animals, while the cell membrane is found in plant cells.
D)The cell wall is found only in plant cells, and the cell membrane is found only in animal cells.
29.
Which describes cytokinesis in an animal cell? 1.e
A)A cell plate forms between the two nuclei.
B)The cell membrane pinches inward.
C)The new cell wall is built by molecules released from the cell membrane.
D)The chromosomes align at the middle of the cell.
30.
Which event occurs during prophase? 1.e
A)The DNA that make up a replicated chromosome twists into tight coils.
B)The chromosomes move to the middle of the cell.
C)The sister chromatids begin to separate.
D)A membrane forms around each set of chromosomes.
Grade 7
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