Cell Surface
What are pseudopods made of and what is one of their main roles?
actin filaments; cell movement/engulfing particles
Diffusion requires energy. True or False?
False- passive
Which organelle is the “powerhouse” of the cell?
mitochondria
The cytoskeleton is made of interlinking ________.
protein filaments
The nucleus directs cell activities and stores ________.
DNA
The three main parts of a cell are ________, ________, and ________.
plasma membrane, cytoplasm, nucleus
Osmosis moves water from a ________ solution to a ________ solution.
hypotonic → hypertonic
Which organelle packages and delivers proteins?
Golgi apparatus
Which filament type forms microvilli and pseudopods?
actin filaments
A codon consists of how many nucleotides?
three
The sugar-rich outer coating of the cell membrane is called ________.
glycocalyx
The sodium–potassium pump moves Na⁺ ________ and K⁺ ________ the cell.
Na⁺ out, K⁺ in
Lysosomes contain what type of enzymes?
hydrolytic enzymes
Which cytoskeletal element organizes the spindle during cell division?
centrosome/centrioles
During RNA processing, noncoding regions called ________ are removed.
introns
Microvilli are supported internally by bundles of what cytoskeletal protein?
actin filaments
Pinocytosis is also known as “cell ________.”
drinking
Peroxisomes generate and break down which reactive molecule?
hydrogen peroxide, H₂O₂
Name one motor protein that “walks” along microtubules.
kinesin or dynein
The ribosome’s three binding sites for tRNA are _______, _______, and _______.
A site, P site, E site
Which human cell type has a flagellum?
sperm cell
The balance between capillary hydrostatic pressure (CHP) and colloid osmotic pressure (COP) is called ________.
net filtration pressure
Rough ER differs from smooth ER because it has ________ attached
ribosomes
Intermediate filaments are mainly for ________.
structural support, tension-bearing
What is the temperature-sensitive “switch point” where ΔG = 0 for spontaneity?
~478 K