1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Masja [62]
3 years ago
12

When does the cell have to use active transport?

Biology
1 answer:
Natasha2012 [34]3 years ago
5 0
<span>When it needs to move molecules across the membrane against a gradient.</span>
You might be interested in
How does synthesis of the leading strand differ from synthesis of the lagging strand during dna replication?
Alexandra [31]

Answer:

DNA replication is a process where the DNA is copied and replicates to produce the 2 identical copies of the molecule. Strands of DNA molecule work as a template for the production of complementary strands. The DNA splits synthesizing a fork. A new DNA is always synthesized in a 5' prime to 3' prime manner. Replication of both the DNA strands goes in two different ways.

1) Leading strands: It is a strand which is goes to the direction same as the replication fork movement and synthesized in 5'-3' prime direction. This strand formation is occurred as nucleotides are continuously added to the 3' prime end after polymerase reads the DNA template (original).

2) Lagging strands: It is a strand which is goes to the opposite direction as the replication fork movement and synthesized in 3'-5' prime direction. It is synthesized in fragments which are known as okazaki fragments. Lagging strand synthesis needs RNA primase.

6 0
3 years ago
30 POINTS(MORE THAN ONE ANSWER)
sweet [91]
B and A. conservation methods are important for native species
5 0
3 years ago
Read 2 more answers
What do the two types of fermentation differ
Zarrin [17]
One is a longer process than the other, also one is more toxic.
5 0
3 years ago
Describe the following methods of genetic engineering: gel electrophoresis,
Sunny_sXe [5.5K]

Gel electrophoresis is a method of genetic analysis which involves seperating segments of DNA based on their size and charge.

It involves cutting DNA with various enzymes, then placing the DNA in an agarose gel. An electrical current is then run through the gel. Because DNA is a polar molecule the DNA segments will travel through the agarose cell as the current is applied. Larger fragments will travel shorter distances than shorter fragments. Two plates with 2 different DNA samples will be conducted and the orientation of the DNA strands will be used to make an analysis by comparing the 2 plates.

6 0
3 years ago
1. which of these is an environmental effect of building dams
velikii [3]
1. <span>Soil Erosion Upstream

2. </span><span>Loss of habitat

Hope this helps!</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • At which temperature dose lactase work fastest?
    11·1 answer
  • The removal of nearly all the Predators from an ecosystem would most likely result in
    7·1 answer
  • Explain the carbon cycle.
    14·2 answers
  • The normal functions of cortisol include
    14·1 answer
  • Which statement about cells is true? A. Only animals have mitochondria. B.Animals have chloroplasts and plants have mitochondria
    5·2 answers
  • At which stage of the scientific process should a scientist look at experimental data from other scientists to set up a new expe
    12·1 answer
  • What helps the algae grow out of control?
    14·1 answer
  • A substance that is produced by a plant that affects how it grows and develops is called a
    8·2 answers
  • What enzyme digests fats and oils in the small intestine?
    10·1 answer
  • What is likely to happen when a cell dies in an adult multicellular organism?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!