James Exam 2 Flashcards
T/F: A reaction with a delta G >0 is exergonic and does not require a net input of energy to proceed.
False
T/F: H+ electrochemical gradients are important in the production of ATP through cellular respiration.
True
T/F: During signal transduction, the original signal is converted to a new signal inside the cell.
True
T/F: NADPH is the electron carrier used in both photosynthesis and mitochondrial electron transport chain.
False
T/F: Bacterial chromosomes are circular and eukaryotic chromosomes are linear.
True
T/F: Tight junctions are present between epithelial cells within an animal’s digestive tract.
True
T/F: Receptors for steroid hormones are transmembrane proteins located on target cells.
True
Bilayer membranes are possible because of the properties of phospholipids, specifically because the head region of a phospholipid is ______, whereas the tail region is ______.
Hydrophilic, hydrophobic
When placing red blood cells in water, _______.
The red blood cell is hypertonic to fresh water
The light harvesting reactions of photosynthesis take place in the _____ membranes of chloroplasts.
thylakoid
As a polypeptide is made, a _____ bond is formed between the carboxyl group in the last amino acid of polypeptide chain and the amino group in the amino acid being added.
Covalent
When a cell secretes a signaling molecule that binds to receptors on neighboring cells as well as the same cell, this is called ____ signaling.
Autocrine
Small molecules, such as cAMP, that relay signals within the cell are called
Second messengers
T/F: Plasmodesmata allow for the direct passage of a large molecules between plant cells.
True
T/F: Cell differentiation does not occur in prokaryotes
True
