Bio 256 Exam Questions with Complete Solutions (Definite Pass)
Which is NOT an individual's survival need? - Answer-reproduction
Which of the following statements is true concerning feedback mechanisms? - Answer-
Negative feedback mechanisms work to prevent sudden severe changes within the body.
Which would be a normal measure of total lipids in venous blood? - Answer-500 mg/100ml
When an organ regulates its activity by mechanisms entirely within the organ itself, its called - Answer-intrinsic regulation
Any water not contained within the cells is said to be part of the body's _____ compartment. - Answer-extracellular
Which organ would get the least blood flow during the running of a marathon? - Answer-
small intestine
Which is a less common element of the human body? - Answer-iodine
Which is an inorganic molecule? - Answer-O2
Water absorbs and releases large amounts of heat before changing temperature. This is important in - Answer-maintenance of body temperature
Cations have a ______________ charge and are formed when they have______________ an electron to/from an anion. - Answer-positive, donated
Which releases OH- in water? - Answer-bases
The normal pH inside your stomach is acidic, and thus, - Answer-lower than 7
A solution that does not change pH with small additions of acid or base is called a - Answer-buffer
A molecule that is a mirror image of another, having a key functional group oriented in a
different direction, is call ____ of the other. - Answer-stereoisomer
Fatty acids and glycerol are parts of - Answer-phospholipids
Milk sugar, lactose, is composed of - Answer-glucose and galactose Which is a molecule with one carbon atom of its glycerol backbone attached to a phosphate group and an alcohol while the two other glycerol carbon atoms are attached
to fatty acids? - Answer-glycolipid
Polyunsaturated fatty acids have ___ double bond(s). - Answer-2 or more
Which is NOT part of an amino acid? - Answer-ribose
After amino acids are assembled into a polypeptide chain, the chain often coils into a spring-like structure called the alpha helix. This coiling is due to ____. - Answer-
hydrogen bonds
Collagen is a ____ protein. - Answer-fibrous
Which is NOT a function of proteins? - Answer-provide genetic code
Which nitrogenous base is NOT found in DNA? - Answer-uracil
RNA is made by ____; protein is made by ____. - Answer-transcription and translation
Which type of RNA is the blueprint for protein synthesis? - Answer-mRNA
During translation, the growing peptide is directly attached to - Answer-tRNA
If a cell needs to make a lot of one certain protein, you would see many ___ if you observed the cell using an electron microscope. - Answer-polyribosomes
What causes two different cells in one individual to display different characteristics? - Answer-different genes are expressed
Which is NOT a function of membranes? - Answer-enzymatic activity
If the products of a chemical reaction contain more total energy than the reactants, the reaction must - Answer-endergonic
Substrate concentration increases the rate of an enzymatic reaction up to a certain point, but then has no further effect and the reaction rate levels off. This is because - Answer-all enzyme active sites are saturated with substrate molecules.
How can defects in the same metabolic pathway result in different symptoms in different
individuals? - Answer-Different enzymes may be defective in the same metabolic pathway, resulting in different diseases.
An atom of molecule has been oxidized when - Answer-it has lost some of its electrons
Which is NOT an individual's survival need? - Answer-reproduction
Which of the following statements is true concerning feedback mechanisms? - Answer-
Negative feedback mechanisms work to prevent sudden severe changes within the body.
Which would be a normal measure of total lipids in venous blood? - Answer-500 mg/100ml
When an organ regulates its activity by mechanisms entirely within the organ itself, its called - Answer-intrinsic regulation
Any water not contained within the cells is said to be part of the body's _____ compartment. - Answer-extracellular
Which organ would get the least blood flow during the running of a marathon? - Answer-
small intestine
Which is a less common element of the human body? - Answer-iodine
Which is an inorganic molecule? - Answer-O2
Water absorbs and releases large amounts of heat before changing temperature. This is important in - Answer-maintenance of body temperature
Cations have a ______________ charge and are formed when they have______________ an electron to/from an anion. - Answer-positive, donated
Which releases OH- in water? - Answer-bases
The normal pH inside your stomach is acidic, and thus, - Answer-lower than 7
A solution that does not change pH with small additions of acid or base is called a - Answer-buffer
A molecule that is a mirror image of another, having a key functional group oriented in a
different direction, is call ____ of the other. - Answer-stereoisomer
Fatty acids and glycerol are parts of - Answer-phospholipids
Milk sugar, lactose, is composed of - Answer-glucose and galactose Which is a molecule with one carbon atom of its glycerol backbone attached to a phosphate group and an alcohol while the two other glycerol carbon atoms are attached
to fatty acids? - Answer-glycolipid
Polyunsaturated fatty acids have ___ double bond(s). - Answer-2 or more
Which is NOT part of an amino acid? - Answer-ribose
After amino acids are assembled into a polypeptide chain, the chain often coils into a spring-like structure called the alpha helix. This coiling is due to ____. - Answer-
hydrogen bonds
Collagen is a ____ protein. - Answer-fibrous
Which is NOT a function of proteins? - Answer-provide genetic code
Which nitrogenous base is NOT found in DNA? - Answer-uracil
RNA is made by ____; protein is made by ____. - Answer-transcription and translation
Which type of RNA is the blueprint for protein synthesis? - Answer-mRNA
During translation, the growing peptide is directly attached to - Answer-tRNA
If a cell needs to make a lot of one certain protein, you would see many ___ if you observed the cell using an electron microscope. - Answer-polyribosomes
What causes two different cells in one individual to display different characteristics? - Answer-different genes are expressed
Which is NOT a function of membranes? - Answer-enzymatic activity
If the products of a chemical reaction contain more total energy than the reactants, the reaction must - Answer-endergonic
Substrate concentration increases the rate of an enzymatic reaction up to a certain point, but then has no further effect and the reaction rate levels off. This is because - Answer-all enzyme active sites are saturated with substrate molecules.
How can defects in the same metabolic pathway result in different symptoms in different
individuals? - Answer-Different enzymes may be defective in the same metabolic pathway, resulting in different diseases.
An atom of molecule has been oxidized when - Answer-it has lost some of its electrons
