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WorksheetsBiology 1st Med 25
Total questions: 40
Worksheet time: 46mins
To which of the following domains do unicellularorganisms which lack nuclei belong?
Eukarya
Archaea
Bacteria
both Archaea and Bacteria
Like your brain, your skin is...
cell
An organ
An organ system
An organism
Which one of the following sequences represents the hierarchical system of classification arranged in order fromthe largest to the smallest ?
kingdom, phylum, domain, class, order, genus,family, species
kingdom, domain, phylum, order, class, genus,family, species
domain, kingdom, phylum, class, order, family,genus, species
species, genus, family, order, class, phylum,kingdom, domain
What is known as the sum total of all the chemical reactions going on in cells?
Metabolism
Nutrition
Growth
Repair
Which of the following terms is a characteristic of life inwhich an organism under goes a semi permanent increasein dry mass, either through a gain in cell size or number (Assuming they are organisms which are not single celled)?
The male and female students and their teaching members of the preparatory year in Imam Abdulrahman University, represents a ..........
population
community
biosphere
ecosystem
Which of the following statements is false?
Tissues exist within organs which exist withinorgan systems.
Communities exist within populati ons which exist within ecosystems.
Organelles exist within cells which exist withinti ssues.
Communities exist within ecosystems which existin the biosphere
Which of the following contains related Families…
Phylum.
Class.
Order.
Genus.
The general term for a large molecule made up of manysimilar subunits is
polymer
functi onal group
monomer
peptide
Nucleic acids are very important in biological organisms.All living organisms use nucleic acids. What is a majorstructural difference when DNA is compared to RNA?
DNA is mostly double stranded.
RNA is mostly double stranded.
RNA uses deoxyribose as its primary sugar.
DNA uses uracil as one of its nitrogenous bases.
Regarding proteins, which of the following statements isfalse?
They are formed of amino acids.
They are unable to change shape.
They functi on as biological catalysts.
Most proteins are water soluble
What is the basic structure of a steroid?
Four fused hydrocarbon rings
Glycerol with three fatt y acid chains
Two fatt y acid chains and a phosphate group
Two six carbon rings
Trying to demonstrate how water moves into cell you havea semipermeable membrane which can be used to make abag resembles cell what sort of solution should you havein the inside and out side
hypo inside , hyper outside
hyper inside , hypo outside
both isotonic
pure water inside
As a cell gets larger ..... !
volume increases and surface area remains thesame
Surface to volume ratio decreases
volume becomes less than the surface area
no change in volume but increase in surface area
proteins for intercellular use are produced by:
smooth ER
rough ER
Golgi apparatus
free floating ribosomes
9+2" array is present within...
cillia and centriole
flagella only
cilia and fl agella
centrioles
choose the correct sentence from the following regarding to mitochondria :
the number of Mitochondria within the cell varieswith the cell's energy requirement.
the number of Mitochondria within the cell is fixed with variable activities.
the number of Mitochondria is fixed in all celltypes.
the number of Mitochondria is low in muscle cells.
Due to the structure of many different components suchas cholestrol, glycoproteins, phospholipids, and proteins,the plasma membrane is:
too rigid
too fluid
a mosaic
all of the above
In a solution, the solute concentration is very high, so:
water concentrati on will not change
water concentrati on is higher
water concentrati on is lower
there is no water
Regarding active transport, which of the following is false ?
requires a membrane protein
transports substances uphill
energy from downhill transport can be used
None of the above
The micotubule structure of centrioles and basal bodies is9 +0 .The number "9" refers to
9 doublets of peripheral microfi laments
9 doublets of peripheral microtubules
9 triplets of peripheral microtubules
9 triplets of peripheral microfilaments
Specialized cell membrane structures that hold cellstogether to from tissues are ...
recognition proteins
adhesion proteins
enzyme proteins
transportation proteins
The final modification of macromolecules occurs in which organelle
smooth endoplasmic reticulum
rough endoplasmic reticulum
Golgi apparatus
mitochondria
Passive transport mainly requires......
energy
protein carrier
energy and protein channels
concentration gradient
If the extracellular fluid is hypertonic to the cytosol of acell, which of the following would happen
water moves outside of the cell resulti ng in cell swelling and bursting
water moves outside of the cell resulting in cell shrinking and death
water moves inside of the cell resulting in cellswelling and bursti ng
water moves inside of the cell resulting in cell shrinking and death
The rough endoplasmic reticulum is especially abundant incells that synthesize extensive amounts of ______
nucleic acids
enzymes
lipids
carbohydrates
A poison binds to a molecule involved in producing ATP. Ifa cell is exposed to this poison, most of it will be foundwithin the ________.
secretory vesicles
nucleus
mitochondria
endoplasmic reticulum
Norvasc is a drug that prevents calcium from entering thecell by blocking the activity of....
transportation proteins
recognition proteins
receptor proteins
enzyme proteins
Steroid hormones are large communication molecules thatare modified cholesterol molecules. How do you think theyenter a cell?
Their size probably allows them to diff use throughthe plasma membrane.
Their protein structure probably allows them todiff use through the plasma membrane.
They must require a protein transporter, becausethe plasma membrane is completely impermeableto molecules
Their lipid nature probably allows them to diff usethrough the plasma membrane.
DNA of a prokaryotic cell is found in the cytoplasm in aregion called
nucleoplasm.
nucleolus
nucleus
nucleoid
Ahmad is admitted to the hospital, an intravenous solutionof normal saline is begun. Since this does not harm thepatient, what is the tonicity of normal saline compared tohis blood?
hypotonic
isotonic
hypertonic
all are correct
Movement of molecules from an area of low concentrationto an area of high concentration occurs by__________
Osmosis.
active transport.
diffusion.
passive transport
A researcher suspects that the food in an ecosystem hasbeen contaminated with radioactive phosphates over aperiod of months. Which of the following macromoleculescould be examined for the radioactive phosphate?
the glucose produced by organisms living in thearea
the starch produced by plants in the area
the DNA of the organisms in the area
All are true.
Protein synthesis takes place in which of the following cellorganelle?
Cell wall
Ribosome
Nucleus
Cytoplasm
Red blood cells placed in distilled water will ...
swell as water moves into the cells by osmosis
shrink as sodium moves out of the cells bydiffusion
swell as water moves into the cells by active transport
remain unchanged because of homeostatic mechanisms
The structural unit of the plasma membrane is:
phospholipids
proteins
cholesterol
carbohydrates
Pinocytosis:
Take in fluid
Take in particles
Excreting wastes
Excreting fluid
Which component is responsible for the plasmamembranes mechanical strength and balance betweenrigidity and flexibility :
phospholipids
cholesterol
proteins
enzymes
Which cell is the most efficient in its cellular functions /absorbing nutrients:
15 micrometers in diameter
10 micrometers in diameter
5 micrometer in diameter
20 micrometers in diameter
A cancer patient is given medicine that inhibits the function of the nucleolus, what is the effect on the cell ..?
inhibition of lipid synthesis
inhibition of protein synthesis
inhibition of carbohydrate synthesis
increase the production of ribosomal RNA
