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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
Genes are carried from parents to offspring on chromosomes.
C
Chromosomes are carried from parents to offspring on hybrids.
D
Hybrid pairs of chromosomes combine to form offspring.
2) What does the notation TT mean to geneticists?
A
heterozygous alleles
B
at least one dominant allele
C
one dominant and one recessive allele
D
two dominant alleles
3) A DNA molecule is shaped like a
A
spiral staircase.
B
straight ladder.
C
triple helix.
D
long, thin rod.
4) Together, respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the atmosphere
A
constantly increasing
B
fairly constant
C
constantly decreasing
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
carbohydrate
B
element
C
compound
D
particle
7) Which term refers to the diffusion of water molecules through a selectively permeable membrane?
A
engulfing
B
active transport
C
osmosis
D
passive transport
8) Why is water important for a cell?
A
Water is an essential organic compound for the body.
B
All proteins are made of water.
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
mitochondrion
B
nucleus
C
chloroplast
D
ribosome
10) Which of the following statements is part of the cell theory?
A
Cells can be produced from nonliving matter.
B
Only plants are composed of cells.
C
All cells are produced from other 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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