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Gr 7 Midterm Review
| Question | Answer |
|---|---|
| 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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