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Alex_Xolod [135]
3 years ago
10

DNA strand replication begins with an RNA primer. DNA strand replication begins with an RNA primer. True False

Biology
1 answer:
nikitadnepr [17]3 years ago
6 0

Answer:

true

Explanation:

DNA synthesis is performed by the enzyme DNA polymerase. However, DNA polymerase requires the presence of a free 3' OH on the existing DNA or RNA segment. The enzyme primase forms small RNA segments that serve as primers. Primers are formed by using the DNA template strands and have free 3' OH ends. DNA polymerase extends the primers by adding deoxyribonucleotides according to the sequence of the DNA template strand. Therefore, DNA polymerases are the enzymes of primer elongation.

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Complete the sentences. Each term may be used more than once.
11Alexandr11 [23.1K]

Answer:

The correct answer is -

1. right-handed

2. right-handed

3. positive

4. left-handed

5. negative

6. negative

Explanation:

In a circular bacterial chromosome, the structure of DNA is a right-handed double helix In a circular bacterial chromosome.

If DNA is twisted in the right-handed direction, it becomes overwound. Overwinding results in positive supercoiling takes place. If DNA is twisted in the left handd direction, it becomes underwound. Underwinding results in negative supercoiling.

f. One effect  negative supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix

8 0
3 years ago
In this activity, you’ll research a threatened ecosystem, the factors that are contributing to its decline in biodiversity, and
chubhunter [2.5K]

Answer:

forest ecosystem is whereby the organism live together and interact with each other and their environment. The biodiversity in this ecosystem is reducing due to the following factors:

1. deforestation: if most of the trees in the forest are been cut down without replacement it will affect the animal living there. especially herbivores, they feed on this plant and use it as a hideout.

2. bush burning: if the bush is burnt it may lead the animals to ran away for there safety and some may die of hunger, and some trees and plants may also become weak and die therefore reducing food for other animals.

3. Climate change: Climate change is one of the reasons. As deforestation may lead to climate change and many other factors, Without transpiration and evaporation cloud won't be form and there will be no rain which may lead to draught and finally animal will die and others will migrate.

possible solution to this

1. Avoid deforestation, and bush and plant more trees.

2. the government can also make laws concerning deforestation, bush burning, burning of fosil fuels and tires to avoid climate change.

5 0
3 years ago
Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl?
Natalka [10]
Fe2O3 + 6HCl -> 2FeCl3 + 3 H2O

If you count the number of each elements on both sides, they are equal. If you need me to explain this better, let me know and I would be glad to help
4 0
2 years ago
Read 2 more answers
true or false a scientist opinion is a valid source of information to use in a scientific investigation?
dedylja [7]
False because it's an "OPINION" not a FACT.
3 0
3 years ago
Jet streams are narrow bands of strong wind that flow between cold and warm air masses. Which direction do these winds blow on E
olchik [2.2K]

Answer:

east west

Explanation:

(*˘︶˘*).。.:*♡good luck!!

6 0
3 years ago
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