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