Cell Structure & Function Flashcards
(18 cards)
After eating some sugar, glucose molecules are transported across the cell membrane of an intestinal cell by:
carrier mediated facilitated diffusion
Examination of a sample of glandular tissue shows extensive smooth endoplasmic reticulum. Which of the following is a likely product of these cells?
steroid hormones
More than one of the above
Lysosomes:
contain acid hydrolases that are potentially dangerous to the cell
The correct order of events required for synthesis of a new protein is:
gene activation, transcription, RNA processing, translation
Ribosomes are made of:
RNA and protein
The cytoskeleton is composed of:
microfilaments, intermediate filaments, microtubules
Transmembrane proteins:
have regions with a high proportion of non-polar amino acids
The two general classes of cells in the human body are:
somatic cells and sex cells
A cell duplicates its chromosomes during the ____ phase.
S
DNA replication is considered semi-conservative because:
each daughter chromosome arising from this process contains an old template strand and a newly synthesised strand
During mitosis, two daughter cells form, each of which has:
the same number of chromosomes as the original cell
In this transport process, the energy from hydrolysis of ATP is used to drive substances across the membrane against their own concentration gradients.
Primary active transport
Which of the following membrane-enclosed organelles modifies, sorts, and packages proteins destined for other regions of the cell?
Golgi complex
Which of the following types of membrane proteins function by recognising and binding to hormones and neurotransmitters?
Receptors
Which of these statements CORRECTLY describes ONE of the four basic methods of cell to cell communication?
Contact dependent signalling requires the interaction between specific molecules and receptors on adjacent cell membranes
The nucleus and the mitochondria share which of the following features:
presence of DNA
Which of the following is the CORRECT order of events in cell signaling?
Chemical signal, receptor, effector, response
