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Grade 7 Cells Final Review B
Test Description: Review
Instructions: Answer all questions to get your test result.
1) What is the chromosome theory of inheritance?
A
Codominant genes combine to form new hybrids.
B
Hybrid pairs of chromosomes combine to form offspring.
C
Genes are carried from parents to offspring on chromosomes.
D
Chromosomes are carried from parents to offspring on hybrids.
2) What does the notation TT mean to geneticists?
A
one dominant and one recessive allele
B
two dominant alleles
C
heterozygous alleles
D
at least one dominant allele
3) A DNA molecule is shaped like a
A
long, thin rod.
B
spiral staircase.
C
straight ladder.
D
triple helix.
4) Together, respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the atmosphere
A
fairly constant
B
constantly decreasing
C
constantly increasing
D
constantly changing
5) What happens during photosynthesis?
A
The cell uses the energy in sunlight to make food.
B
The cell uses glucose to make oxygen.
C
The cell uses oxygen to make food.
D
The cell uses the energy in sunlight to make carbon dioxide.
6) A substance that cannot be broken down into simpler elements is a(n)
A
particle
B
compound
C
element
D
carbohydrate
7) Which term refers to the diffusion of water molecules through a selectively permeable membrane?
A
passive transport
B
active transport
C
osmosis
D
engulfing
8) Why is water important for a cell?
A
All proteins are made of water.
B
Water is an essential organic compound for the body.
C
Water is the main ingredient in DNA.
D
Most chemical reactions in cells require water.
9) Which organelle is the control center of a cell?
A
ribosome
B
chloroplast
C
nucleus
D
mitochondrion
10) Which of the following statements is part of the cell theory?
A
All cells are produced from other cells.
B
Cells can be produced from nonliving matter.
C
Only plants are composed of cells.
D
Cells are one of several basic units of structure and function in living things.
*select an answer for all questions
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