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kompoz [17]
3 years ago
10

What is an important structural molecule of cell membrane..?

Biology
1 answer:
guajiro [1.7K]3 years ago
8 0
Most important and abundant one are the phospholipids - amphiphatic molecules with an hydrophilic head and a hydrophobic hydrocarbon tails. They compose the membrane bilayer. Also important are the membrane proteins, which can be periheric and internal and can serve as channels, receptors, pumps etc. 
Depending on the cell type the membrane can also contain cholesterol (in animal cells, enhances the membrane stability) or hopanes(in prokaryotes, same function as cholesterol) or ether-phospholipids with branched hydroharbon tails(in archaea, make the membranes more stable and resistant to severe conditions, as archaeas are extremophiles)
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During which phase do the chromosomes make copies of themselves so that there are two of each one?
SashulF [63]

Answer:

The beginning and majority of the time is known as Interphase. Interphase is 80% of the total cycle and is where the cell does most of the work in replicating organelles, chromosomes, and preparing to undergo Mitosis which is the actual splitting process where one cell becomes two. During Interphase there are 3 major steps, G1, S, and the G2 phase.

Explanation:

4 0
3 years ago
​____ allow bacteria to join together to transfer genes.
anzhelika [568]
The answer is pilus. This structure joins two bacteria of same species and allow exchange of genetic material in a process called horizontal gene transfer (conjugation). The plasmid of one of the bacteria (the mobile plasmid) is nicked once and the strand moves through the pillus to the other bacteria. It combines with the other plasmid or chromosome to for recombinant dna.
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3 years ago
Critically analyze the following three popular training systems: bigger, faster, stronger (BFS); crossfit; and high intensity tr
elixir [45]

Answer:

The answer is explained below

Explanation:

The BFS program consists of training for agility, flexibility and sport-definite technique five days per week and weight training three days per week. This program is specifically for athletes and not for your average fitness clients; it still does not adhere to the Principle of Individual Differences.

CrossFit- Crossfit is a strength and conditioning program mainly the mix of aerobic exercise, calisthenics (Body weight exercise). In this type of gyms use equipment for multiple disciplines including barbells, dumbbell, pull-up bars. This type of workout makes body more flexible and capable to bear the abnormalities when necessary. Many types of workout are in it like, Chipper (squats, press ups, burpees), Ladder.

HIT – High Intensity Training refers to the one set failure type training program promoted as the most effective and scientifically based strength training program. In this type of program multiple sets of each exercise are performed. Volume is the most common form of weight training program seen in the gym and fitness centers. HIT also recommended sporting persons.

Human born with different strengths and weakness, this fact is considerable for the training program. When beginners at any sport see great improvement when he or she starting their programs. Person needs to improve their loading as possible to make them stronger.

Nowadays CrossFit is the best workouts to have to do because it makes physically stronger, flexible and smarter.

6 0
3 years ago
A. convert sunlight to chemical energy. B. The , the , and the support the plant cell and help it to maintain its shape. C. stor
Bumek [7]

Answer:

1 plus 1 + 2= 8 ur welcome ;]

Explanation:

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Bioaccumulation is the process by which chemicals are stored in the tissues of living organisms. It is the accumulation of chemicals in the tissue of organisms through any route including, respiration, ingestion or direct contact with contaminated water, sediment and pore water in the sediment. These chemical substances include, pesticides or other chemicals.
3 0
3 years ago
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