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Biological Science

Showing 1-75 of 155 answers

A neuron is a nerve cell; the fundamental unit of the nervous system
  • True Correct
  • False
A rare change in the DNA of a gene
  • Mutation Correct
  • Chromosome 
  • Dominant Trait 
  • RNA 
A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. How will genetic drift probably affect this population?
  • It will accelerate the appearance of new traits Correct
  • It will increase the number of alleles for specific traits
  • It will reduce genetic diversity
  • It will promote the survival of chimpanzees with beneficial traits
A transgenic organism:
  • has foreign DNA Correct
  • has poisons
  • is inedible
  • is harmful
Abundant and powdery pollen produced by small, indistinct flowers is probably transported by:
  • bees and butterflies
  • flies
  • wind Correct
  • birds
All is true about GMOs except:
  • GMOs are created by introducing recombinant DNA into an organismby any means
  • GMOs are harmful to human health and the environment Correct
  • GMOs are created by generating genomic DNA fragments with restriction endonucleases
  • GMOs maybe created by over expressing proteins in E coli
All of the following comprise our white blood cells except:
  • neutrophils
  • macrophage
  • platelets
  • cardiomyocytes Correct
All of the following sentences are , except one Which statement is false?
  • Genetic engineering of crops will wreck our ecosystem because improper statistical analysis and field trials are currently conducted Correct
All of the following sentences are correct, except one. Which statement is false?
  • Statistical evidences are important in biological sciences 
  • Bioinformatics encompass a wide range of subject areas 
  • Genomic scale dataset for all other species include biochemical information on metabolic pathways, regulatory networks, protein-protein interaction data from different types of experiments, and systematic knockouts of genes 
  • Genetic engineering of crops will wreck our ecosystem because improper statistical analysis and field trials are currently conducted Correct
An inbred is usually unfit for survival. Why?
  • Inbreeding is an abomination of natural laws
  • Inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes Correct
  • DNAs repel in closely related organisms
  • Somatic cells are incompatible
An organism produced by cross mating of two highly related species is called a: 
  • GMO
  • transgender
  • mutant
  • hybrid Correct
Apoptosis is ________________.
  • similar to necrosis
  • all of the answers correct
  • programmed cell death Correct
  • similar to cell division
Arctic foxes typically have a white coat in the winter. In summer, when there is no snow on the ground, the foxes typically have a darker coat. Which of the following is most likely responsible for the seasonal change in coat color?
  • The lower temperatures in winter denature the pigment molecules in the arctic fox coat, causing the coat to become lighter in color
  • The decrease in the amount of daylight in winter causes a change in gene expression, which results in the foxes growing a lighter appearing coat Correct
  • The diet of the foxes in summer lacks a particular nutrient, which causes the foxes to lose their white coat and grow a darker colored coat
  • Competition for mates in the spring causes each fox to increase its camouflage with the environment by producing a darker appearing coat
Bioinformatics is:
  • Used the power of computing to address biological questions
  • The study of data in sciences
  • Involves several statistical tools
  • All of these Correct
Biomarkers are useful for:
  • add flavor to fruits
  • producing brightly colored plants
  • mark genes related to plant diseases Correct
  • prove ownership of trees
Birds are believed to be descendants of:
  • fungi
  • fishes
  • mammals
  • It will reduce genetic diversity
  • dinosaurs Correct
Blood carries carbon dioxide rich blood towards which organ?
  • Heart
  • Lungs Correct
  • Kidneys
  • Liver
Blood component containing the inorganic materials to be distributed to cells in the body:
  • intracellular fluid
  • blood plasma Correct
  • extracellular fluid
  • no correct answer
Choose which one of the following traits are needed for a health science professional.
  • All of the answer is correct Correct
  • attention to detail, compassion and technical skills 
  • good problem-solving and decision making ability 
  • Interpersonal communication skills 
Command line versions of the BLAST programs are available for all operating system.
  • True
  • False Correct
Corn develops from a seedling with a single cotyledon, displays parallel veins on its leaves, and produces monosulcate pollen. A monocot is a plant characterized by:
  • parallel veins on the leaves
  • a monosulcate pollen
  • a single cotyledon
  • all of the answers Correct
Databanks with a gatekeeper are slow in incorporating new data and accurate, while databanks without a gatekeeper are fast and inaccurate.
  • True Correct
  • False
DNA double helix does not have which of the following?
  • Major and minor grooves
  • Uracil Correct
  • Complementary base pairing
  • Antiparallel configuration
DNA molecule that is distinct from the chromosome; this molecule can be used to move foreign DNA in or out of a cell:
  • Plasma membrane
  • Plasmodic membrane
  • Plasma
  • Plasmid Correct
DNA replication involves unwinding two strands of parent DNA, copying each strand to synthesize complementary strands, and releasing the parent and daughter DNA. Which of the following accurately describes this process?
  • This is an anabolic process
  • This is both anabolic and catabolic
  • This is a catabolic process
  • This is a metabolic process but is neither anabolic nor catabolic Correct
During the systolic phase of the cardiac cycle, the heart is ________.
  • filling with blood
  • contracting Correct
  • contracting and relaxing
  • relaxing
Environmental scientists have the following skill sets:
  • All of the answers correct Correct
  • Capacity to write papers
  • Interpersonal social skills
  • Communication skills
Evolution is important for:
  • large organisms, like people and elephants
  • all organisms Correct
  • abiotic factor in the environment
  • small organisms like fungi and mushrooms
Fishes living in coral reefs develop this adaptation to their environment: 
  • sharp fangs
  • aggressiveness
  • colorful scales Correct
  • episodic isolation
Gene therapy can be used to introduce foreign DNA into cells ________.
  • Of tissues to cure inheritable disease
  • For molecular cloning
  • By PCR
  • All of these Correct
Genetic recombination occurs by which process?
  • Independent assortment
  • Chromosome segregation
  • Sister chromatids
  • Crossing over Correct
Genomics can be used in agriculture to:
  • All of these Correct
  • Improve disease resistance
  • Improve yield
  • Generate new hybrid strains
Genomics can be used on a personal level to:
  • Predict genetic diseases that a person may have inherited
  • Determine the risks of genetic diseases for anindividual's children
  • Decrease transplant rejection
  • All of these Correct
Glucose molecule is a:
  • monosaccharide
  • disaccharide Correct
  • carbohydrate
  • protein
Growing stems are made up of ________.
  • meristematic tissue Correct
  • permanent tissue
  • vascular tissue
  • dermal tissue
If DNA is likened to a ladder, what are the compounds that make up the sides of the ladder?
  • Phosphates and bases
  • None of these
  • Phosphates and sugars Correct
  • Bases only
If DNA is likened to a ladder, what are the compounds that make up the steps of the ladder?
  • phosphates and bases
  • phosphates and sugars
  • no correct answers
  • bases only Correct
In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching. In order for this disease to be passed from generation to generation there must be parent birds that:
  • are heterozygous for the disease Correct
  • are closely interbred
  • have the disease themselves
  • produce new mutations for this disease
In either plant or anImals reproducing sexually, the embryo developing from a fertilized egg is also known as:
  • sepal 
  • mitosis 
  • cotyledon
  • zygote  Correct
In eukaryotes, where is the DNA wrapped around?
  • Polymerase
  • Single-stranded binding proteins
  • Sliding clamp
  • Histones Correct
In most stable freshwater environments, populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a:
  • procedure
  • result
  • theory Correct
  • hypothesis
In the life sciences there are typically two types of publication:
  • Rely mostly or wholly on subjective evidence
  • Those that use large data sets
  • Based on speculations
  • None of these Correct
In which direction does DNA replication take place?
  • 5'
  • 3'-5'
  • 3'
  • 5'-3' Correct
Individuals that are well adapted to their environment will survive and produce
  • fewer mutations
  • more offspring Correct
  • better traits
  • stronger genes
It is believed that all life on Earth began from a:
  • Bacteria Correct
  • Bird
  • Mammal
  • Dinosaur
Molecular cloning can be used in agriculture to:
  • increase variety and yield
  • use less pesticides
  • all of the answers correct Correct
  • improve hybrid traits
Most dinosaurs existed during:
  • Cretaceous period Correct
  • Industrial Revolution
  • Big Bang
  • Cambrian period
Mutations within a DNA sequence are:
  • unnatural processes that always affect the phenotype
  • natural processes that produce genetic diversity Correct
  • unnatural processes that are harmful to genetic diversity
  • natural processes that always affect the phenotype
One of the statements about a scientific theory below is in Which statement is this?
  • Science is an arcane, ivory-towered institution that do not need any system of checks and balances Correct
One of the statements about a scientific theory below is incorrect. Which statement is this?
  • Accepted scientific ideas are reliable because they have been subjected to rigorous testing, but as new evidence is acquired and new perspectives emerge these ideas can be revised
  • Science is a community endeavor that relies on the cumulative knowledge from different groups and disciplines
  • The science of cell and molecular biology deals with cell life cycles and differentiation, development from egg to adult
  • Science is an arcane, ivory-towered institution that do not need any system of checks and balances Correct
Order the scientific method steps (numbered items) with the process of solving the everyday problem (lettered items). 1. Observation-A 2. Question-B 3. Hypothesis-C 4. Prediction-D 5. Experiment-E 6. Result-F
  • A, B, C, D, E, F Correct
  • A, D, C, B, F, E
  • A, C, B, D, E, F
  • A, C, B, E, D, F
Oxygen and carbon dioxide are mainly exchanged in which organ?
  • heart
  • kidney
  • blood
  • lungs Correct
Pairs of chromosomes that are similar in size and genetic composition are:
  • Haploid
  • Diploid
  • Chromatin
  • Chromatids Correct
Part of an experiment wherein variables are not changed.
  • control Correct
  • hypothesis
  • theory
  • variable
Plant parts which is responsible for getting nutrients from the soil:
  • roots Correct
  • trichomes
  • lenticels
  • nodes
Plant regions covering the outer layer of the stems are made up of ________.
  • meristematic tissue
  • permanent tissue
  • dermal tissue Correct
  • vascular tissue
Plants are the main source of this gas in the planet:
  • argon
  • carbon dioxide
  • oxygen Correct
  • nitrogen
Plants convert carbon dioxide to ________.
  • oxygen
  • all of the choices are correct Correct
  • starch
  • sugar
Pollen grains develop in which structure?
  • the stigma
  • the carpel Correct
  • the filament
  • the anther
Post-translational modifications of proteins can affect which of the following?
  • Chromatin modification
  • Protein function
  • All of these Correct
  • Transcriptional regulation
Red blood cells:
  • carry oxygen to different organs of the body Correct
  • can be classified as granulocytes or agranulocytes
  • defend the body against bacteria and viruses
  • are also called leucocytes
Similarities in sequence and function of two proteins indicate that they are members of a family that share a common ancestor. If they are from different species, they are called:
  • Orthologs
  • Homologs Correct
  • Proteologs
  • Paralogs
Small changes happening to the individuals of a species that live in a particular area are called a
  • variation Correct
  • fossil
  • group
  • population
Strokes are often caused by ________.
  • Viruses
  • Neurodegeneration
  • Seizures
  • Blood clots or burst blood vessels Correct
Targeted therapies are used in patients with a set gene expression pattern. A targeted therapy that prevents the activation of the estrogen receptor in breast cancer would be beneficial to which type of patient?
  • Patients who express the EGFR receptor in normal cells
  • Patients that have no estrogen receptor expressed in their tumor
  • Patients with a mutation that inactivates the estrogen receptor
  • Patients with lots of the estrogen receptor expressed in their tumor Correct
That makes primates ideal for living in land?
  • They can make social contacts
  • They can ward off predators using land tools
  • All of the answers correct Correct
  • They can walk upright
The building blocks of lipids are ________.
  • peptides
  • sugars
  • nitrogenous bases
  • fatty acids Correct
The building blocks of nucleic acids are ________.
  • Sugars
  • Nitrogenous bases
  • Nucleotides Correct
  • Peptides
The digestive juices from the liver are delivered to the ________.
  • stomach
  • duodenum Correct
  • colon
  • liver
The DNA and chomosomes are located in which prt of the cell?
  • plasma membrane
  • nucleolus
  • nucleus Correct
  • vacuole
The ends of the linear chromosomes are maintained by
  • DNA pol
  • Primase
  • Helicase
  • Telomerase Correct
The first forms of life on Earth were thought to be_________.
  • prokaryotes
  • single-celled plants Correct
  • large animals such as dinosaurs
  • insects
The first level of DNA organization in a eukaryotic cell is maintained by which molecule?
  • condensin
  • chromatin Correct
  • cohesin
  • histone
The first organisms that oxygenated the atmosphere were
  • anaerobic organisms
  • cyanobacteria Correct
  • all of the answers correct
  • phototrophic organisms
The human eye contains rods and ___________, which convert light into information the brain can process.
  • Cilia
  • Cornea
  • Cones Correct
  • Curtains
This course is taught by the mentor:
Professor Jerson C. Bungcaras

Jerson C. Bungcaras

Bachelor of Science in Secondary Education Major in Biological Science.

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