Biology MCQ
The building of a large organic molecule from small subunits involves multiple ________.
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Correct Answer:
Dehydration synthesis reactions
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Examine the figure below. phytoplankton live in the ________.
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Correct Answer:
Photic zone.
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Energy is transferred from atp to other molecules by transferring a(n) ________.
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Correct Answer:
Phosphate group.
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Women who go on _______ commonly lose their menstrual periods.
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Correct Answer:
Exercise binges
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Many antibiotics kill bacteria because they hinder translation by prokaryotic _____.
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Correct Answer:
Ribosomes
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When two or more species vie for the same limited resource, ______ occurs.
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Correct Answer:
Competition
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Echinoderm larvae are ________________, while echinoderm adults are ________________.
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Correct Answer:
Bilateraly symmetrical; radially symmetrical
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Earth's biosphere is not completely self-contained (or closed) because _____.
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Correct Answer:
Plants, algae, and photosynthetic bacteria obtain energy from sunlight, and heat escapes from the biosphere into space
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During aerobic exercises such as dancing, as glucose is used by the muscles, ____.
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Correct Answer:
Glucose use decreases
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Describing a person as having hemophilia is to indicate his or her ______.
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Correct Answer:
Phenotype
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The human genome project has the potential to ______
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Correct Answer:
Play a role in all of the
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Final protein refinements, storage, and packaging occurs ________.
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Correct Answer:
In the Golgi apparatus.
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It's perfectly natural for loss to be followed by __________.
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Correct Answer:
Feelings of euphoria.
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The common ancestor of all these chordate groups except the _____ probably had paired appendages.
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The chemoheterotroph proteus vulgaris is a rod-shaped bacterium classified with _____.
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Correct Answer:
Proteobacteria
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The arms of the sister chromatids dissociate from each other during ________ of mitosis.
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The appearance of an evolutionary novelty promotes _____.
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Correct Answer:
Adaptive radiation
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The "triplet code" refers to the fact that _________.
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Correct Answer:
Three nucleotides code for a single amino acid
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Substances that plug up an enzyme's active site are ______.
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Correct Answer:
Enzyme inhibitors
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Streptococcus pyogenes is classified with _____.
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Correct Answer:
Gram-positive bacteria
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Strains of pathogens that mildly harm, but do not kill, the host plant are termed _____.
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Correct Answer:
Avirulent
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Stop codons are unique because they __________.
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Do not code for amino acids that allow a releasing factor to bind to the A site of the ribosome
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Biomedical waste is mostly disposed of through ________.
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Incinerating
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Fertile hyphae that bear spores are called _____.
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Correct Answer:
Sporangium
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Based on his experiments, mendel concluded that each trait was controlled by two _____.
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_____ means "jointed feet." annelida nematoda arthropoda echinodermata
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Correct Answer:
Phylum Arthropoda
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Your body is approximately _______ percent water.
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When the mature ovum leaves the ovary, it is caught by the _____.
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What we know to be true about emergency contraception is that it ________.
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Correct Answer:
Can prevent up to over 95% of pregnancies when taken within 5 days after intercourse.
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Whales have vestigial legs. this suggests they _____.
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Correct Answer:
Descended from land animals
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Water makes a good coolant because it has a ____.
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Correct Answer:
High specific heat
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Water is the lightest (least dense) when it ________.
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Water is __________ when a nucleotide is added to the end of a dna strand.
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Correct Answer:
PRODUCED.
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Water flows into the source end of a sieve tube because _____.
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Correct Answer:
Sucrose has been actively transported into the sieve tube, making it hypertonic.
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Viral stis are ________.
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Correct Answer:
Incurable
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The taxon species may be defined by reproductive isolation and _____.
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Correct Answer:
Morphology
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The roundworm body cavity is ________, whereas the planarian body cavity is ________.
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Correct Answer:
Eucoelomic; pseudocoelomic
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The processes of chemical cycling would be studied mainly by ________.
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Correct Answer:
An ecosystem ecologist
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The polymerization of amino acids into a protein is an example of _____.
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Correct Answer:
An anabolic pathway
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The phenotypic ratio for the f2 generation in a dihybrid cross will theoretically be _____.
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The opening of stomata is thought to involve _____.
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Correct Answer:
Movement of K+ into guard cells
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The normal, or ________, eye accommodates properly.
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Correct Answer:
Emmetropic
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The movement of water across a semipermeable membrane is _____.
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The most effective molecule for nitrogenous waste disposal in desert animals would be __________.
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Correct Answer:
Both a and b
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The mitochondrial internal cristal membranes are joined to ________.
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Correct Answer:
Inner metichondrial membrane
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The mesoderm gives rise to _____
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Correct Answer:
Both a and b
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The lipid bilayer forms because the lipids are __________.
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Amphiphathic
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The ia and ib alleles of the abo blood group gene i exhibit ____.
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Codominance
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The human immunodeficiency virus infects and kills _____.
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Antibodies
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The high osmolarity of the renal medulla is maintained by all of the following except _____.
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Correct Answer:
Diffusion of salt from the descending limb of the loop of Henle
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The golgi apparatus packages materials into ________ for transport or export.
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The force driving simple diffusion is _____, while the energy source for active transport is _____.
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Correct Answer:
The concentration gradient; ATP
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The following statements are true of hiv: ____.
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Correct Answer:
All of these are correct.
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The effects of soil on flora and fauna are called ________.
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The deadliest cancer of the female reproductive system is _________ cancer.
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The connection between structure and ________ is a basic concept of biology.
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The concept of a membrane as a fluid mosaic reflects the ability of ________.
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Correct Answer:
Phospholipids and most proteins to drift about in the plane of the membrane
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The concentrations of ions are very different inside and outside a nerve cell due to _____.
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Correct Answer:
Sodium-potassium pumps
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The binomial system assigns to each organism a unique name that describes its __________.
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Correct Answer:
Genus and species
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Sturtevant's genetic mapping _____.
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Correct Answer:
Orders genes on a chromosome based on recombination frequencies
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Self-incompatibility _____.
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Correct Answer:
Helps maintain genetic variability in a population
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Seaweed and kelp are _____ algae.
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Correct Answer:
Both A & D
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Refer to the illustration. humans have the type of body cavity shown in ______.
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Refer to the illustration. an organism with no body cavity is shown in _________.
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Reactants called _______ bind to an enzyme's _______ site where a chemical reaction takes place.
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Correct Answer:
Substrates; active
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Osmosis can be defined as ______.
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Correct Answer:
The diffusion of water
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One side of your face is identical to the other side. you are _____.
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Correct Answer:
Bilaterally Symmetrical
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Nutrients leave the small intestine and are carried by the blood to the _____.
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Nematodes and arthropods both _____
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Grow by shedding their exoskeleton
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Most of the signals that neurons receive are ___________; others are the opposite, or ________.
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Excitatory; inhibitory
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Most aquatic animals use _____.
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External fertilization
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Influx of ____ or _____ ions result in epsps.
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Na+; Ca++
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In the linnaeus system, a(n) ________ contains similar phyla.
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In his work with pneumonia-causing bacteria and mice, griffith found that __________.
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Some substance from pathogenic cells were transferred to nonpathogenic cells, making them pathogenic.
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Due to water's ____________ , it is capable of dissolving a great number of substances.
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Cystic fibrosis is a disease that __________
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Correct Answer:
All of the above
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Consider the photograph of a karyotype. this is _____.
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Correct Answer:
A photograph of all a person's chromosomes
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Carbon is fixed in the biosphere through ________ into carbohydrate compounds.
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Correct Answer:
Photosynthesis
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Carbon dioxide is split to form oxygen gas and carbon compounds _____.
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Correct Answer:
In neither photosynthesis nor respiration
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An interconnected series of tubes in the cytoplasm is called the _____.
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Correct Answer:
Endoplasmic reticulum
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All cells are enclosed by a plasma membrane that is similar in ________ and ________.
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Correct Answer:
Structure . . . function
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Adrenal glands in males release _____, which are secreted during puberty.
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Correct Answer:
Androgens
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A characteristic of arthropods that has allowed for their great success is the presence of ______.
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Correct Answer:
An exoskeleton
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A _____ is a short, fleshy stem surrounded by enlarged, fleshy bases of leaves.
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_____ prevents seeds from germinating until conditions are favorable for the growth of the plant.
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Abscisic acid
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_____ are secreted by the adrenal glands.
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Correct Answer:
Aldosterone
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Very small organisms, like paramecia or protozoa, moving around in water __________.
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Almost immediately come to rest once they stop swimming
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The separation of soil into distinct layers is _______.
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Correct Answer:
Horizonation
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The best way to reduce wind erosion on a farm is to _____.
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Correct Answer:
Plant ground cover in unused fields
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The asexual spores produced by members of the phylum ascomycota are called __________.
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Nitrifying bacteria participate in the nitrogen cycle mainly by _____.
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Converting ammonium to nitrate, which plants absorb
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In asexual reproduction, _______ organism(s) can produce other organisms.
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In ____, semen is expelled into the bladder.
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Retrograde ejaculation
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In _____ conditions, the cell wall will help prevent the cell from bursting.
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Hypotonic
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Hyphae with two nuclei per cell are called __________.
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Dikaryotic.
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Fungi release digestive enzymes into their _____.
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Surroundings
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Fungi produce _____ spores.
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Fungal species are classified in a particular phylum based on __________.
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The type of sexual structure they form
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Fungal mycelia _____.
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Have a large surface area composed of branching hyphae
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Fire algae are known as dinoflagellates because _____.
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They have two flagella
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