biology Q1 review
Adding water to breakdown is A - Dehydration synthesis B - Hydrolysis
B
A fully functioning enzyme molecule is arranged in a complex three-dimensional shape. Tis shape determines the A - specific type of molecule it interacts with during a reaction B - rate at which the enzyme breaks down during a reaction it regulates C - pH of all body systems D - temperature of the products of the reaction it regulates
A
In a scientific investigation, after the question is defined, the next step is most likely A - formulating a hypothesis B - identifying needed equipment C - designing the experiment D - collecting the data
A
In graphs, the independent variable are the A - x axis B - y axis
A
Removing water to put together is A - Dehydration synthesis B - Hydrolysis
A
The respiratory system of an elephant functions in a similar way to which organelle in a single celled organism? A - cell membrane B - nucleus C - vacuole D - chloroplast
A
What is the major component of plasma membranes? A - lipids B - carbohydrates C - nucleotides D - proteins
A
Which pH value indicates the most acidic condition? A - 1.6 B - 2.1 C - 7.3 D - 11.1
A
Which sequence of terms is in the correct order from simplest to most complex? A - cells -> tissues -> organs -> organ systems B - tissues -> organisms -> cells -> organ systems C - cells -> tissues -> organ systems -> organs D - organs -> organisms -> organ systems -> cells
A
Which structure is best observed using a compound light microscope? A - cell B - virus C - DNA sequence D - inner surface of a mitochondrion
A
A wet-mount slide preparation of a specimen is stained in order to A - eliminate some organelles B - make cell structures more visible C - use the high-power lens D - remove water from the slid
B
All the following are true regarding cells except A - All cells have genetic material B - All cells have cell walls C - All cells have plasma membranes D - All cells can divide to form new cells
B
In response to an increasing blood glucose level, the human body will normally A - store the glucose in cell nuclei B - release a hormone that lowers the blood glucose C - produce a hormone that destroys the glucose D - use the excess glucose to make proteins
B
Materials are transported within a single-celled organism by the A - nucleus B - cytoplasm C - mitochondrion D - ribosome
B
Nutrition involves those activities by which organisms A - remove cellular waste products B - obtain and process materials needed for other activies C - exchanged gases with their environment D - absorb and circulate materials
B
Scientific claims should be questioned if A - peer review was used to examine the claims made by scientists B - the experimental results cannot be repeated by other scientists C - conclusions follow logically from the evidence D - the data are based on samples that are very large
B
Which cell structures are correctly paired with their functions? A - the mitochondria produce enzymes, and ribosomes transport them B - the ribosomes make proteins, and the nucleus stores genetic information C - the cell membrane makes enzymes, and cytoplasm transports them D - the vacuole stores genetic information, and chloroplasts make proteins
B
Which group consists entirely of organic molecules? A - protein, oxygen, fat B - protein, starch, fat C - water, carbon dioxide, oxygen D - water, starch, protein
B
Which technique could be used to make the structures in the cells more visible when using a compound light microscope? A - paper chromatography B - staining C - electrophoresis D - gene manipulation
B
A new drug for the treatment of asthma is tested on 100 people. The people are evenly divided into two groups. One group is given the drug, and the other group is given a glucose pill. The group that is given the glucose pill serves as the A - experimental group B - limiting factor C - control D - indicator
C
In plants, glucose is converted to cellulose, and in human muscle cells, glucose is converted to glycogen. These processes are examples of which life activity? A - regulation B - respiration C - synthesis D - excretion
C
In which cell structure is energy extracted from nutrients? A - chloroplast B - ribosome C - mitochondrion D - vacuole
C
Luciferin is a molecule that, when broken down in fireflies, produces heat and light. The rate at which luciferin is broken down in cells is controlled by a/an A - carbohydrate B - simple sugar C - enzyme D - complex fat
C
Starch molecules are hydrolyzed into smaller units known as A - glycerols B - amino acids C - simple sugars D - proteins
C
The cytoplasm in a single-celled organism and the circulatory system in a human both A - break down molecules into smaller components B - release energy to be used by the organism C - transport substances throughout the organism D - distribute blood to all the parts of the organism
C
The highest possible magnification that can be obtained when using a microscope is A - 40x B - 100x C - 400x D - 4,000x
C
The process that removes metabolic waste products from an organism is known as A - egestion B - secretion C - excretion D - oxidation
C
What is the primary function of eggs typically? A - food supply for predators to preserve predator population B - adaption to allow maximum freedom for parent birds C - continuation of the species through reproduction D - preservation of the exact genetic code of the parent birds
C
Which group contains only molecules that are each assembled from smaller organic compounds? A - proteins, water, DNA, fats B - proteins, starch, carbon dioxide, water C - proteins, DNA, fats, starch D - proteins, carbon dioxide, DNA, starch
C
Which statement concerning simple sugars and amino acids is correct? A - They are both wastes resulting from proteins synthesis B - They are both building blocks of starch C - They are both needed for the synthesis of larger molecules D - They are both stores as fat molecules in the liver
C
Which statement describes a failure of homeostasis in humans? A - When activity in an individual increases, the body temperature rises and the individual sweats B - As the concentration of carbon dioxide increases in the human body, the lungs begin to expel more carbon dioxide C - A viral infection leads to a decrease in the number of white blood cells being produced in the body D - After an individual gets a cut, certain chemical changed begin the healing process
C
Which substance is an inorganic molecule? A - starch B - DNA C - water D - fat
C
An iodine test of a tomato plant leaf revealed that starch was present at 5:00 pm on a sunny afternoon in July. When a similar leaf from the same tomato plant was tested with iodine at 6:00 am the next morning, the test indicated that less starch was present. This reduction in starch content most likely occurred because starch was A - changed directly into proteins B - transported out of the leaves through the guard cells C - transported downward toward the roots through tubes D - changed into simple sugars
D
Glucose molecules are the building blocks of what class of macromolecule? A - proteins B - lipids C - nucleotides D- carbohydrates
D
In single-celled organisms, materials are stores primarily in A - ribosomes B - mitochondria C - nuclei D - vacuoles
D
The analysis of data gathered during a particular experiment is necessary in order to A - formulate a hypothesis for that experiment B - develop a research plan for that experiment C - design a control for that experiment
D
The bonding of simple sugars to form a starch molecule is caused by A - an antibody B - a hormone C - a receptor D - an enzyme
D
What is the name of the bond linking amino acids together? A - ionic bond B - phosphodiester bond C - glyosidic bond D - peptide bond
D
Where are the protons found? A - the outside of the atom B - animal cell C - plant cell D - in the nucleus of the atom
D
Which class of molecules is responsible for speeding up chemical reactions? A - sugars B - fats C - genetic material D - enzymes
D
Which process is a form of autotrophic nutrition? A - transport B - regulation C - fermentation D - photosynthesis
D