Answer:
Due to their hole size.
Explanation:
Some molecules can pass directly through the phospholipid bilayer because of their small size which can easily pass through the small holes of phospholipid bilayer, while those that are too large or too charged need to pass through a membrane protein because membrane protein has a large holes through which large molecules can easily pass through the semi-permeable membrane of the cell by active or passive transport.
Starch blocker help prevent the body from absorbing starches so you don't absorb calories, and fat blockers are kind of the same thing, they don't let your body absorb fat, instead it excretes it as waste.
Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
There are several key differences between prokaryotic and eukaryotic cells. Eukaryotic cells are found in multicellular plants and animals, whereas prokaryotic cells are found in bacteria and archaea which are ususlly unicellular. I have summarised the key differences below:
Prokayotic cells do not have membrane-bound organelles, such as the endoplasmic reticulum or mitochondria.
Prokaryotic cells do not have a nucleus, instead they have circular DNA that is free in the cytoplasm.
Prokaryotic cells have smaller ribosomes than eukaryotic cells.
Prokaryotic cells have a cell wall. Their cell wall is made from a different material to a plant cell, a glycoprotein called murein.
Prokaryotic cells may also have a protective layer called a capsule, flagellum to aid in movement and one or more plasmids.
2.
22. A student wants to test the effect of temperature on relative enzyme activity. The table below shows
.
data from this experiment.
Temperature (*)
30
40
50
60
70
80
90
100
Relative Enzyme Activity (%)
After 10 minutes After 20 minutes
17
20
34
40
42
50
71
75
85
95
34
44
13
18
9
10
After 30 minutes
19
38
48
73
90
40
15
9
I
What are the independent and dependent variables in this experiment?
A. Independent-relative enzyme activity:
dependent--number of minutes
B. independent--number of minutes;
dependent--relative enzyme activity
C. Independent-relative enzyme activity:
dependent--temperature
D. Independent-temperature;
dependent-relative enzyme activity
