Which chemical elements would you expect to find in abundance in a living cell?

Transcription

1 Which chemical elements would you expect to find in abundance in a living cell? 1. hydrogen, neon, argon 2. carbon, oxygen, hydrogen 3. iron, magnesium, calcium 4. sodium, potassium, sulfur hydrogen, neon... carbon, oxygen iron, magnesiu... sodium, potass...

2 What is the most common form hydrogen and oxygen are found in living things? 1. Fats 2. Water 3. Protein 4. DNA 76% 2 Fats Water Protein DNA

3 How can the acronym CHNOPS help you remember the elements found in living things? 1. It stands for children have not often played school. 2. It is the name of the most common chemical element. 3. It is the chemical symbol of the 6 most common elements. 4. It is a code that can be unlocked with a password. 2 8 It stands for... It is the name... It is the chem... It is a code t...

4 What are the functions of lipid molecules? 1. provide molecules for body structures and enzymes 6 2. contain genetic information that guides cell functions. 3. provide quick energy when the body needs it. 27% 4. store energy and release it when it is needed. 9% provide molecu... contain geneti... provide quick... store energy a...

5 Which of the following is a main component of enzymes and is responsible for the structure of cells and tissues? 1. Lipid 2. Nucleic Acid 3. Protein 4. Carbohydrate 62% 15% 15% 8% Lipid Nucleic Acid Protein Carbohydrate

6 Water is polar in nature. To be polar means to: 1. be very cold and difficult to warm up. 2. freeze easily and boil rapidly 3. have positive and negative charged ends 4. have a low heat capacity be very cold a... freeze easily... have positive... 85% 12% have a low hea...

7 Water helps living organisms maintain internal balance. The best example of this is when water 1. forms layers inside the cell. 2. prevents large fluctuations in body temperature 3. uses capillary action to move water to great heights 4. helps small bugs stay afloat on the waters surface forms layers i... 77% 9% 9% 5% prevents large... uses capillary... helps small bu...

8 A reaction in a cell can more rapidly because of which type of molecules? 1. Enzymes 2. Carbohydrates 3. Fats 4. Vitamins 48% 48% Enzymes Carbohydrates Fats Vitamins

9 Which of the following is composed of autotrophic cells? 1. Frog 2. Grass 3. Mushroom 4. Insect 25% 33% 42% Frog Grass Mushroom Insect

10 Which cells cannot create their own energy from sunlight and depend on other organisms for a food supply? 1. Trophic 2. Metatrophic 3. Autotrophic 4. Heterotrophic 8 8% Trophic Metatrophic Autotrophic Heterotrophic

11 Which process releases energy for use by plant cells? 1. Cellular Respiration 2. Photosynthesis 3. Radiation 4. Metabolism 56% 32% 8% Cellular Respi... Photosynthesis Radiation Metabolism

12 Which macromolecule is produced during photosynthesis? 1. nucleic acids in the form of DNA 2. proteins in the form of cellulose 3. carbohydrates in the form of glucose 4. lipids in the form of steroids nucleic acids... 88% 8% proteins in th... carbohydrates... lipids in the...

13 Which of the following is a reactant in the photosynthetic reaction? 1. sugar 2. carbon dioxide 58% 3. oxygen 4. heat and motion 23% 15% sugar carbon dioxide... oxygen heat and motio...

14 Answer the following questions based on the this information: A snail and elodea (a waterplant) are placed in a sealed aquarium and placed in an area that receives regular sunlight.

15 What is entering this system? 1. O 2 2. CO 2 3. water 4. light 63% 21% 17% O2 CO2 water light

16 When would the least photosynthesis be occurring? 1. at night 2. in the morning 3. noon 4. evening 10 at night in the morning noon evening

17 Use this information to answer the next two questions. Two test tubes contain a water plant and water. Several drops of bromthymol blue are added to each test tube. The bromthymol blue has carbon dioxide added to it and is a greenish color. Tube A is placed in a sunny window and tube B is placed in a cupboard.

18 Carbon dioxide creates a weak acid in bromthymol blue which makes it green. The test tube A turned from green to blue. Where did the carbon dioxide go? 1. It turned into oxygen It was absorbed by the water 3. It was combined with the bromthymol blue. 4. It was used by the plant It turned into... 22% It was absorbe... It was combine... It was used by...

19 The water in test tube B turned yellow indicating more carbon dioxide was added. What processes were taking place in tube B? 1. respiration 2. photosynthesis 3. cohesion 4. adhesion 48% 4 12% respiration photosynthesis cohesion adhesion

20 Where do new cells come from? 1. From the lymph glands. 2. From preexisting cells 3. From food molecules in the digestive tract. 4. From the blood From the lymph... From preexisti... 96% From food mole... From the blood

21 Which process provides new cells for growth and replacement of body cells? 1. metabolism 2. Respiration 3. digestion 4. mitosis 77% 1 5% 5% metabolism Respiration digestion mitosis

22 What part of a cell must be duplicated exactly during mitosis? 1. cell membrane 2. centrioles 3. chromosomes 4. mitochondria 83% 8% cell membrane centrioles chromosomes mitochondria

23 The cell cycle describes the life activities of a cell. Which of the following describes the cell cycle of a typical cell? 1. growth, preparation for mitosis, mitosis 52% 2. resting stage, mitosis 3. mitosis, resting stage, reduction phase 4. cell formation, growth, resting stage growth, prepar... resting stage,... 13% mitosis, resti... 3 cell formation...

24 What does mitosis allow organisms to do? 1. fight off disease 2. grow 3. metabolize 4. move 77% 12% 8% fight off dise... grow metabolize move

25 What technology development made it possible to see cells for the first 1. hand lens 2. microscope 3. teloscope 4. ultra sound time? 92% hand lens microscope teloscope ultra sound

26 What scientist is given credit for our understanding of cell theory? 1. Leeuwenhoek used a microscope to discover cork cells. 2. Galileo fought for the rights of scientists to express their findings. 3. Watson discovered how DNA is structured in a cell. 4. Many scientists contributed to our understanding of cell theory. Leeuwenhoek us... 4 Galileo fought... 36% 2 Watson discove... Many scientist...

27 Before cell theory was widely accepted, people believed that life could come from non-living things. How did science change their perceptions? 1. by providing evidence that all new life comes from existing cells 2. by showing people cork cells that looked like the smallest living things. 3. by using experiments that showed only diseases come from nonliving things. 4. by finding a cell that could divide easily and rapidly. by providing e... 79% by showing peo... by using exper... 13% by finding a c...

28 Which term defines the movement of water through a membrane from an area of high concentration to low? 1. active transport 2. diffusion 3. mitosis 4. osmosis 63% 33% active transpo... diffusion mitosis osmosis

29 Which process requires a cell to use energy to move materials across its membrane when a concentration difference does not exist? 1. active transport 2. diffusion 3. mitosis 4. osmosis 92% 8% active transpo... diffusion mitosis osmosis

30 How does a body cell maintain homeostasis when placed in a fresh 1. It must pump out lipids as the fresh water comes in. water environment? 2. It must pump in fresh water using active transport. 3. It must pump out the incoming fresh water. 4. Homeostasis will be maintained if the cell does nothing. 8% 5 38% It must pump o... It must pump i... It must pump o... Homeostasis wi...

31 Why must homeostasis be maintained in a cell? 1. Water will enter the cell if homeostasis is not maintained. 2. Salt will leave the cell if homeostasis is not maintained. 3. Wastes, water and nutrients must stay in the correct balance. 4. The cell membrane will lose the lipid bi-layer without homeostasis. 48% 2 16% 16% Water will ent... Salt will leav... Wastes, water... The cell membr...

32 A cell with a large number of ribosomes would be capable of what 1. storing fat 2. sending electrical signals 3. creating proteins 4. contracting task? 92% storing fat sending electrical signals creating proteins contracting

33 How would a cell respond to the loss of its nucleus? 1. It would not be able to guide its functions. 91% 2. It could not create energy from food. 3. It would reproduce uncontrollably. 4. It could not move substances across the cell membrane. 5% 5% It would not b... It could not c... It would repro... It could not m...

34 Which cell organelle is responsible for processing energy in the cell? 1. golgi body 2. mitochondria 3. nucleus 4. ribosome 78% 22% golgi body mitochondria nucleus ribosome