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WorksheetsQuiz 2 (MCQ): Topic 2 - Cell Structure & Functions
Total questions: 30
Worksheet time: 17mins
Which of these statements is one of the generalisations of the cell theory?
All cells contain nucleus.
DNA is a genetic material found in all cells.
New cells arise from pre-existing cells.
Eukaryotic cells evolved from prokaryotic cells.
Which of the following is the most significant difference between prokaryotic and eukaryotic cells?
Prokaryotic cells have a cell membrane; eukaryotic cells do not.
Prokaryotic cells possess ribosomes; eukaryotic cells do not.
Eukaryotic cells have DNA; prokaryotic cell do not.
Eukaryotic cells have membrane-bound organelles; prokaryotic cells do not.
In bacteria, DNA is found __________________________
in the nucleus alone.
in both the nucleus and organelles.
in the nucleoid as a single circular thread.
in organelles alone.
Which of these cell features is ABSENT in a bacteria cell?
Plasma membrane
Nucleus
Nucleoid
Cytoplasm
Unlike eukaryotic cells, prokaryotic cells ____________________.
have RNA, not DNA.
do not have cell wall.
have mesosome instead of mitochondria.
have cell membranes as well as nuclear envelope.
One of the key distinctions between plant and animal cells is the presence of ____________cells, which is lacking in ________________cells.
a Golgi body in plant; animal
a Golgi body in animal; plant
a vacuole in animal; plant
a vacuole in plant; animal
Which of the following are found in both plant and animal cells?
Nucleus, Golgi body and chloroplasts
Ribosomes, mitochondria and plasma membrane
Centrioles, cell walls and nucleolus
Vacuoles, nucleolus and starch grains
Which organelles contain DNA?
Nucleus and mitochondria
Mitochondria and lysosome
Nucleus and Golgi body
Lysosome and Golgi body
Which of the following pair of organelles have double membranes?
Chloroplast and mitochondria
Mitochondria and ribosomes
Nucleus and ribosomes
Chloroplast and ribosomes
The organelles that have one single layer of membrane are
I. lysosome
II. vacuole
III. nucleus
I only
I and II only
II and III only
I, II and III
Which is NOT found as part of all cells?
Cell wall
Cell membrane
Ribosomes
DNA
Which of the following is NOT TRUE concerning the nuclear envelope?
It has two lipid bilayer.
There are pores in the membrane.
Ribosomal subunits can pass out of the nucleus.
DNA molecules are transported out through the pores
A researcher made an interesting observation about a protein made by rough endoplasmic reticulum which is eventually used to build a cell’s membrane. The protein in the membrane was actually slightly different from the protein made in the ER. The protein was probably modified in the …
Golgi body.
smooth endoplasmic reticulum.
mitochondria.
Nucleus.
Which of the following statements is the function of lysosomes?
Involved in generating ATP by aerobic metabolism
Destroy worn out organelles
Involved in the separation of chromosomes
Involved in modifying, sorting and transporting proteins and lipids
The phospholipids molecules of most membranes have …
a hydrophilic head and a hydrophilic tail.
a hydrophobic head and a hydrophobic tail.
a hydrophilic head and two hydrophobic tails.
a hydrophobic head and two hydrophilic tails.
Cell that does not conduct electrical impulses but instead support and insulate neurons is ______________.
axon
neuron
cell body
neuroglia
Which of the following muscle tissues has a striated appearance?
I. Skeletal
II. Cardiac
III. Smooth
I and II only
I only
II and III only
I, II and III
Special connective tissues include ________________________.
cartilage, bone and blood.
cell wall
ribosome
chloroplast
The _________________secrete the matrix that makes up the ground substance of the cartilage.
lacunae
osteocytes
chondrocytes
chondrin
Specialised parenchyma cells which carry out some of the metabolic function that are needed to maintain the associated sieve tube members are called the __________
sieve cell
vessel member
companion cells
tracheid
Plasmodesmata are….
used in energy transformation within the cell.
typical of animal cells more than plant cells.
cross connections between cell walls.
found most frequently in bacteria.
Xylem is composed of all of the following cell types EXCEPT:
tracheids
vessel elements
fibres and parenchyma
sieve tube elements
Sclereids are found in _____________________
root tips.
seed coats.
mesophyll cells that produce food.
secretion.
Xylem is composed of all of the following cell types EXCEPT:
tracheids
vessel elements
fibres and parenchyma
sieve tube elements
Endocytosis moves material _______________ a cell via _________________.
into; facilitated diffusion
into; membranous vesicles
out of ; diffusion
out of ; membranous vesicles
In a hypotonic solution, an animal cell will …
lyse.
experience turgor.
neither gain nor lose water.
shrivel.
Which of the following characterizes the sodium-potassium pump?
Sodium ions are pumped out of the cell against their concentration gradient.
Potassium ions are pumped into the cell against their concentration gradient.
The pump protein undergoes a conformational change.
All of the above.
A wilted flower placed in a vase of water for several hours became stiff and stood erect. When it was placed in a salt solution, it wilted. From this information we can say that the cells of the flower are:
hypotonic to both fresh water and the salt solution.
hypertonic to both the fresh water and the salt solution.
hypertonic to fresh water but hypotonic to the salt solution.
hypotonic to fresh water but hypertonic to the salt solution.
The movement of a substance across a biological membrane against its concentration gradient with the help of energy input is….
diffusion
active transport.
osmosis.
facilitated diffusion.
Four groups of onion cells, each with a water potential (φ) of -400 kPa, are placed in four solutions w, x, y and z with different water potential. In which solution is there a net movement of water into the cells by osmosis?
Solution: w Water potential φ (kPa) = 0
Solution: x Water potential φ (kPa) = -400
Solution: y Water potential φ (kPa) = -600
Solution: z Water potential φ (kPa) = -800
