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Science Module #9 Study Questions
Terms in this set (20)
9.2 What are the four criteria for life?
1. All life forms contain deoxyribonucleic acid which is called DNA 2. All life forms have a method by which that extract energy from the surroundings and convert it into energy that sustains them. 3. All life forms can sense changes in their surroundings and respond to those changes. 4. All life forms reproduce
9.3 What does DNA provide to a living organism?
9.4 Compared to other molecules, is DNA big or small?
9.5 Does DNA store its information more efficiently or less efficiently than a computer?
9.6 DNA is made up of two basic parts: the backbone and the nucleotide bases. Which part stores the information? Which part forms the double-helix structure?
The nucleotide bases stores the information and the backbone forms the double-helix structure
9.7 Which nucleotide base will link to adenine? Which will link to cytosine?
9.8 One half of a portion of DNA has the following sequence: cytosine, guanine, adenine, guanine, thymine, thymine. What is the sequence of nucleotide bases on the other half of this portion?
Guanine, cytosine, thymine, cytosine, adenine, adenine
9.9 One half of a portion of DNA has the following sequence: Thymine, guanine, cytosine, adenine, thymine, guanine. What is the sequence of nucleotide bases on the other half of this portion?
Adenine, cytosine, guanine, thymine, adenine, cytosine
9.10 What is the name of the chemical that plants make food for?
9.11 What is the name of the chemical that plants often store their food as?
9.12 For most organisms, metabolism requires food and something else. What is that something else?
9.13 Metabolism produces energy and usually two other things. What are they?
Water and Carbondioxide
9.14 An organism's receptors no longer work. Which of the four criteria of life will the organism not be able to perform?
All life forms can sense changes in their surroundings and respond to those changes.
9.15 Would you expect a fierce, rarely eaten shark, or an anchovy that is the major source of food for other creatures to have more offspring?
Anchovy would have more.
9.16 Every once in a while, a female cat will be born sterile. This means that the cat cannot have kittens. Does this mean that the cat is not alive, since it cannot reproduce?
No, because it's cells reproduce.
9.17 Is the population of people on this earth becoming a problem?
9.18 Indicate what the arrows are pointing to in the cell diagram.
A. Organelles B. Nucleus C. Cytoplasm D. Membrane
9.19 In which organelle is most of the DNA stored?
9.20 How many basic kinds of cells are there? Name them.
3, Animal, Bacterial, and Plant cells.
9.21 If a scientist uses a microscope to examine a cell from a mouse, a cell from a leaf, and a cell from a cat, how many different basic kinds of cells will she see?
2, a plant cell and 2 animal cells