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
madreJ [45]
3 years ago
9

Explain why each chromosome must become two strands before the cell divides.​

Biology
1 answer:
sp2606 [1]3 years ago
8 0

Answer:

To allow transcription enzymes to access the DNA strand

Explanation:

The DNA double helix is made up of two complementary strands wound around each other, and tightly packaged as chromosomes.

DNA and RNA polymerases promote either DNA or RNA synthesis by attaching free nucleases to parent strands (a), which are then unwound and isolated by helicases (b). DNApolys synthesize DNA in a 5'-3 ' direction; owing to its restricted flow, there are only two types of replication: continuous from the point of differentiation of chromosomes, fork, and discontinuous from the fork.

You might be interested in
The bacteria in some foods are sterilized by placing the food near a source of ionizing radiation does that mean that the food b
Firlakuza [10]
<span>Normally sterilizing food using radiation does not induce radioactivity but sometimes it may change the taste, texture of the food and it may also destroy the nutrients. radiation is used to kill the harmful bacteria and to increase the shelf life. when the radiation is very energetic it alters the food structure but it does not make it radioactive. To become radioactive one has to make a nucleus unstable. ionizing radiation normally cannot do this. FDA has established maximum energy levels for radiation to prevent the treated foods from becoming radioactive. The energy levels of the rays are too low to induce radioactivity in the food. So there is no harm in consuming treated foods.</span>
4 0
3 years ago
Name and define the two main kinds of reproduction
inysia [295]
Asexual And Sexual is the correct answer
4 0
3 years ago
During the Devonian period of Gondwanaland what were the two organisms that thrived?
gulaghasi [49]

Answer:

about the Trilobites is =Trilobites ( /ˈtraɪləˌbaɪt, ˈtrɪ-, -loʊ-/;[4][5] meaning "three lobes") are a group of extinct marine artiopodan arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 million years ago), and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mass extinction at the end of the Permian about 252 million years ago. Trilobites were among the most successful of all early animals, existing in oceans for almost 300 million years.[6] . and about the algae is =Algae (/ˈældʒi, ˈælɡi/; singular alga /ˈælɡə/) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as Chlorella and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to 50 metres (160 ft) in length. Most are aquatic and autotrophic and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem, which are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the Charophyta, a division of green algae which includes, for example, Spirogyra and stoneworts.

Explanation:

5 0
2 years ago
Which of the following blood components provide the major defense for our bodies against viruses
Katarina [22]

Answer:

White blood cells

Explanation:

7 0
2 years ago
Which two generalizations can be made based on what you know about cycles of matter in a closed system?
Black_prince [1.1K]

Answer: The correct answer is option 3) The amount of matter within the system remains the same and 5) The cycle has a well-defined starting and stopping point.

A closed system can be defined as a system in which there is the only exchange of energy with the surrounding, while no exchange of matter takes place.  

In a closed system, the cycle has a well-defined starting and stopping point.

Therefore, the two generalizations which can be made for cycles of matter in a closed system are option 1) and 5)

4 0
3 years ago
Read 2 more answers
Other questions:
  • Activity Many farmers and gardeners compost their plant and animal waste. The living material naturally decays in compost bins,
    11·2 answers
  • The fact that environmental influences have an impact on development
    12·2 answers
  • Which defects of neural tube closure are most common?
    15·1 answer
  • Which statement concerning sexual reproduction is correct?
    5·1 answer
  • Professional psychological associations require researchers to minimize infection, illness, and pain in animal subjects.
    5·2 answers
  • Decomposers are very important because
    9·2 answers
  • how would the pattern of apoptosis differ in a duck’s webbed foot compared to the pattern of apoptosis in a mouse’s foot? Explai
    13·1 answer
  • What’s the difference between weather and climate, and what comprises the Earth's atmosphere? Explain the relationships between
    7·1 answer
  • Plz answer mah question ;-;
    12·1 answer
  • Consider the statement, “If plants disappeared from Earth, all other forms of life would continue to thrive.” Is this statement
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!