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| Which is the smallest unit of life? |
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| An experimenter will not do which of the following? |
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| manipulates dependent variables |
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| In order to arrive at a solution to a problem, a scientist usually proposes and tests __________. |
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| The nucleic acid core of a virus may be composed of ______________________. |
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| Today, scientists usually agree that there are _____ kingdoms. |
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| Organisms that are producers obtain their energy from ______. |
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| Organs are composed of tissues, which are composed of cells. This is an example for which characteristic of life? |
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| Living things are organized. |
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| Of the following, which is called an "educated guess”? |
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| A scientific name consists of ___________________. |
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| Most organisms exhibit this characteristic when trying to maintain constant environments. |
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| Four of the five listed below are characteristics of life. Select the exception: |
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| If a form of a trait improves chances for surviving and reproducing in a given environment, it is a(n) ________ trait. |
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| Four of the five answers listed below are necessary characteristics to the life of an individual. Select the exception: |
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| Molds and mildew belong to __________. |
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| The capacity to evolve is based on variations in heritable traits, which originally arise through ______. |
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| Substances with a pH between 7 and 14 are: |
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| Which of the following is made up of a combination of the others? |
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| The bond formed between an oxygen atom and two hydrogen atoms in a molecule of water in which electrons are shared unequally. |
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| a chemical combination of atoms whose proportions do not vary. |
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| The atomic number refers to the |
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| number of protons in an atom. |
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| Which of the following bonds is most easily broken? |
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| The negative subatomic particle is the: |
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| Magnesium has an atomic number-12 and an atomic mass number- 24. How many electrons are in its third energy shell? |
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| Cellular pH is kept near a value of 7 because of |
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| What is the maximum number of electrons that can be found in the first shell of an atom? |
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| a combination of two or more atoms. |
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| How do hydrophobic molecules react with water? |
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| Any molecule or ion that dissolves in some solvent. |
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| The molecules of life are _____ compounds. |
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| Amino acids commonly have a standard _____ letter abbreviation. |
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| Milk sugar is __________. |
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| Carbohydrates, like glucose and glygen, function primarily |
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| for energy and energy storage. |
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| A fatty acid with one or more double bonds in its hydrocarbon chain is said to be |
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| Carbon is very versatile because it can form up to ____ bonds with other atoms. |
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| Glucose, with 6 carbons, can form a linear or _____ configuration. |
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| The main energy source for most organisms is |
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| solid at room temperature and saturated. |
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| Which of the following is NOT true concerning lipids? |
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| they readily dissolve in polar substances |
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| The building blocks of lipids are |
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| Which of the following is NOT a complex carbohydrate? |
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| Most carbohydrates consist of carbon, hydrogen, and _____ in a 1:2:1 ratio. |
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| Which of the following are macromolecules characteristic of life? |
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| Proteins function ________. |
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| Messengers for building proteins. |
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| According to the fluid mosaic model, a membrane is composed of |
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| a phospholipid bilayer with embedded proteins. |
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| Who wrote the paper “Micrographia"? |
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| both flagella and cilia but not Golgi bodies or ribosomes. |
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| DNA synthesis occurs in the nucleus. Which organelle can digest this nucleic acid? |
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| Move cell parts along microtubules when fueled by ATP? |
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| One portion of the cell theory states that |
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| all living organisms are made up of cells. |
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| Which of the following modern microscopes uses beams of electrons to illuminate an object? |
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| These are the primary structures for the packaging of cellular secretions for export from the cell. |
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| Which of the following contain enzymes for intracellular digestion. |
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| Organelles in plant cells that function in photosynthesis or storage are called |
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| Which of the following is best associated with plant cells? |
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| chloroplasts and cell wall |
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| Three of the four answers listed below are bound by membranes. Select the exception |
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| These are sometimes referred to as rough or smooth, depending on the presence or absence of ribosomes. |
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| Which of these extract energy stored in carbohydrates, synthesize ATP, and produce water and carbon dioxide? |
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| The rate of diffusion through a semipermeable membrane will be lowest when which of the following are true? |
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| Rosalind Franklin's research contribution was essential in |
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| establishing most of the principal structural features of DNA. |
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| Which scientist(s) identified the transforming substance involved in changing R bacteria to S? |
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| Avery & fellow biochemists. |
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| A solution that has a higher concentration of solute as compared to the interior of a cell is said to be ____. |
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| For all cells and many viruses, a nucleic acid that is the molecule of inheritance. |
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| In the pairing of two nucleotides within the double helix |
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| This explains the movement of molecules from an area of low concentration to an area of high concentration. |
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| The significance of Fred Griffith's experiment in which he used two strains of Streptococcus pneumoniae is that |
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| it demonstrated that harmless cells had become permanently transformed though a change in the bacterial hereditary system. |
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| The appropriate adjective to describe DNA replication is |
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| A DNA strand having the sequence C-G-A-T-T-G would be complementary to the sequence ______. |
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| Who discovered what would eventually be called deoxyribonucleic acid (DNA)? |
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| When DNA replication begins, |
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| the two DNA strands unwind from each other. |
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| A small organic compound of a five-carbon sugar, nitrogen-containing base, and a phosphate group. |
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