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Gr 7 Midterm Review

What is the control center of the cell? nucleus
What organelle stores materials in the cell? vacuole
Define volume. The amount of space an object takes up
What happens during cellular respiration? Glucose that we eat is broken down and converted to usable energy
What is an autotroph? An organism that makes its own food (plants)
What is the difference between active and passive transport? Active transport requires energy. Passive transport does not.
What is the shape of DNA? double helix
TRUE/FALSE: All living things use DNA/RNA to code for their genetic information. TRUE!!!
What organelle is the site of protein synthesis in the cell? ribosomes
How is resolution different from magnification? Magnification means making the object bigger. Resolution is about how CLEARLY you can see the image.
What organelle breaks down cell waste? lysosomes
What is photosynthesis? The plant cell uses the energy in sunlight to create food
Why is it important to only test ONE VARIABLE at a time in an experiment? To make sure that the results are valid
The metric system is based on the number ___________. 10
What product of photosynthesis do many living things need to survive? oxygen
How do we calculate the total magnification of a microscope? Multiply the power of the eyepiece by the power of the objective lens.
What organelle is most responsible for cellular respiration? mitochondria
Mitosis is defined as The cells nucleus dividing into 2 new nuclei
What is the function of the cell wall? To protect and support the plant cell
In DNA, adenine always pairs with thymine
What is a heterotroph? A heterotroph is an organism that cannot make its own food and must eat other organisms to survive
What is homeostasis? Maintaining stable internal conditions
The phase of mitosis where chromosomes line up in the middle is called metaphase
Name the 3 parts of the cell theory. 1. All living things are made of cells. 2. All cells come from other cells. 3. Cells are the basic units of structure and function in living things.
What is osmosis? A form of PASSIVE transport where WATER moves across a membrane from high to low concentration
Which step in the scientific method is referred to as an educated guess? The hypothesis
Who is the father of modern genetics? Gregor Mendel
Which scientist observed single celled organisms which he called animalcules? van Leeuwenhoek
___________ alleles always show up when present. DOMINANT
What is a hybrid? An individual with 2 different alleles for the same trait
During what part of the cell cycle does DNA replication occur? Interphase
DNA and RNA are both _______________ acids. Nucleic
_____________ is the study of living things. Biology
What is a phenotype? The physical trait that is visible in an organism
What is the name of the pigment that captures sunlight in plants? Chlorophyll
The rungs of the DNA "ladder" are made of One pair of nitrogen bases (Either A/T or C/G)
The steps used to test the hypothesis are called the experiment
Name the phases of mitosis in their correct order. prophase, metaphase, anaphase, telophase
How are respiration and photosynthesis related? They are opposite reactions
What is diffusion? The movement of molecules across a semipermeable membrane from high to low concentration. (a form of passive transport)
Name 2 ways DNA and RNA are different. 1. DNA is double stranded/RNA is single stranded 2. In DNA adenine pairs with thymine. In RNA adenine pairs with Uracil)
How are mitosis and meiosis different? Mitosis creates cells that are exact copies and meiosis creates cells with 1/2 the genetic information. (sex cells)
Name the two organelles only found in PLANT CELLS. Cell wall and chloroplasts
What is the function of the endoplastmic reticulum? It is a series of pathways in the cell
What is the function of the mitochondria? This is where cellular respiration takes place
What happens to our Gummy Bears when we soaked them in water? Why? They swelled up because osmosis caused the water to move into the Gummy Bear.
Created by: cwalczak
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