Lactase is enzyme composed of a polypeptide hydrolyzes the disaccharide lactose
ID: 226476 • Letter: L
Question
Lactase is enzyme composed of a polypeptide hydrolyzes the disaccharide lactose to produce monarchies. The optimal pH for lactase activity is 6. Transfer of lactase to pH 5 results in a substantial decrease in enzyme activity, likely due to the disruption of only the primary structure of the enzyme. the secondary and tertiary structure of the enzyme. the primary and secondary structure of the enzyme. the secondary, tertiary, and quaternary structure of the enzyme. Which of the following may be found in eukaryotic cells, but not in bacteria? endoplasmic reticulum plasma membrane ribosomes DNA When subcellular components from disrupted cells are separated using centrifugation, the primary factor that determines whether a specific cellular component remains in the liquid solution or ends up in the pellet is how hydrophobic the component is. the relative solubility of the component. the carbohydrate composition of the component the relative size and weight of the component. A cell with an abundance of free ribosomes is most likely enlarging its vacuole.. producing primarily an abundance of new membranes. producing primarily proteins for secretion. producing primarily cytoplasmic proteins The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? smooth ER Golgi apparatus rough ER lysosomes Which of the following statements correctly describes a function of the Golgi apparatus? protein modification and sorting assembly of ribosomal subunits synthesis of cytoplasmic proteins detoxification of toxins Thylakoids, DNA, and ribosomes are all components found in chloroplasts nucleoli. lysosomes. mitochondria Plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells? tight junctions peroxisomes gap junctions desmosomes Movement of vesicles within the cell depends on what cellular structures? actin filaments and motor proteins centrioles and motor proteins microtubules and motor proteins actin filaments and microtubules Which of the following will be found in nearly all eukaryotic cells? mitochondria capsule cell wall chloroplast Extracellular matrix proteins are produced by ribosomes in which part of a eukaryotic cell? rough ER lysosomes nuclear envelope cytoplasmExplanation / Answer
Solution
Options are :-
1:- A - Only the Primary Structure of the Enzyme
2 :- A - Endoplasmic Reticulum
3 :- D - The Relative Size and weight of the component
4 :- B - Producing primarily abundance of new membrane.
5 :- C - Rough Endoplasmic Reticulum.
6 :- A - Protein modification and sorting.
7 :- A- Chloroplast.
8 :- C- Gap junction.
9 :- C- Microtubules and motor proteins.
10 :- A Mitochondria
11 :-A Rough Endoplasmic Reticulum.
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