BIO 101 ACTUAL EXAM QUESTIONS WITH 100% VERIFIED ANSWERS

BIO 101 ACTUAL EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS 2025-2026



Which one of the following statements about the endomembrane system

is correct?

~The endoplasmic reticulum is continuous with the plasma membrane.

~Most of the phospholipids of the endomembrane system are synthesized

in the mitochondria.

~Mitochondria function in the modification and sorting of lipids and

proteins.

~Proteins that will be secreted from the cell are likely to be found in closed

spaces bounded by membranes of the endomembrane system.

~Ribosomes move lipids and proteins among the different organelles of

the endomembrane system. - ANSWER

Proteins that will be secreted from the cell are likely to be found in closed

spaces bounded by membranes of the endomembrane system.



A cell has formed a food vacuole as it ingested a food particle. Which of

the following events is associated with the breakdown of that food

particle?

~proteins for digestion of the food particle were initially processed in

mitochondria

~digestion of the food particle occurs in a vesicle enclosed by a

membrane that separates the digestion from the cytoplasm

~the membrane of the food vacuole is derived from the cell wall

,~proteins for digestion of the food are made by ribosomes in the Golgi

apparatus

~enzymes for the breakdown of the food are delivered to the food vacuole

from the cytosol - ANSWER digestion of the food particle occurs in a

vesicle enclosed by a membrane that separates the digestion from the

cytoplasm



Mitochondria are found in __________.

~animal cells only

~all cells

~plant cells only

~animal cells and prokaryotic cells, but not plant cells

~plant and animal cells - ANSWER plant and animal cells



The cilia and flagella of eukaryotic cells are composed of _____.

~intermediate filaments

~pili

~tonofilaments

~microtubules

~microfilaments - ANSWER microtubules



Which of the following functions is NOT associated with the cytoskeleton

in eukaryotic cells? See Concept 6.6

(Page)

~determining the shape of animal cells

~the beating of cilia or flagella

~the contraction of muscle cells in animals

~maintaining the position of the nucleus in the cell ~Movement of RNA

molecules from the nucleus to the cytoplasm - ANSWER Movement of

,RNA molecules from the nucleus to the cytoplasm



structure? plant or animal? membrane protein complexes that strengthen

the adhesion between adjacent cells, like

rivets, to protect against pulling forces - ANSWER

desmosomes, animal



structure? plant or animal? small channels that form across the plasma

membranes of adjacent cells; especially important in intercellular

communication - ANSWER gap junctions, animal



structure? plant or animal? membrane proteins that create a watertight

seal between cells - ANSWER tight junctions, animal



structure? plant or animal? small channels between cells that are

otherwise surrounded by walls; enable movement of water and solutes

between cells - ANSWER plasmodesmata, plant



a polysccaride that is used to synthesize cell walls which

protect cells and help maintain their shape - ANSWER

cellulose, plant



long proteins of fibers found in the extracellular matrix that

provide structural support for cells - ANSWER collagen,

animal



The _____ is composed of DNA and protein.

~flagellum

~chromatin

, ~mitochondrion

~ribosome

~centriole - ANSWER chromatin



Ribosomal subunits are manufactured by the _____.

~rough endoplasmic reticulum

~nucleolus

~smooth endoplasmic reticulum

~peroxisome

~lysosome - ANSWER nucleolus



_____ are the sites of protein synthesis.

~Mitochondria

~Golgi apparatuses

~Ribosomes

~Peroxisomes

~Microfilaments - ANSWER ribosomes



Which of these organelles manufactures proteins bound for secretion out

of the cell?

~Golgi apparatus

~lysosomes

~nucleolus

~rough endoplasmic reticulum - ANSWER rough ER



The _____ is a selective barrier, regulating the passage of material into

and out of the cell.

~lysosome

~chloroplast