3. How many times can the nuclear DNA replicate during the life cycle of a cell? *Always

Only once

Twice

Many times

Answers

Answer 1
Answer: Only once because the DNA replication initiation is tightly linked to cell cycle progression,ensuring that replication occur only once per cycle

Related Questions

A large section of the lower troposphere with uniform temperature and humidity is called _______.A. a hurricaneB. a hemisphereC. a pressure gradientD. an air mass
During passive transport, substances travel___The concentration gradient
What is the relationship between an individual named pinus palustris and an individual named pinus elliottii?
Help please! A bee lands on a flower to collect nectar needed to make food. Pollen from the flower sticks to the bee's body. The bee then flies to another flower to collect more nectar. While there, the pollen from the first flower rubs off, pollinating the plant. This allows the plant to reproduce. Which type of symbiotic relationship does this represent?
Grapes growing on a vine are observed to shrink slightly during the day and increase in size at night. This is because: a. developing fruits, such as grapes, transpire a lot of water to stay cool. b. photosynthesis to produce sugar occurs in the light, but respiration and, therefore, the growth of new cells occurs mostly in the dark. c. in leaves, phloem flow to growing sinks only occurs when the stomata are closed, because the transport capacity of the xylem is too small to supply water for both transpiration and phloem flow. d. during the day, transpiration pulls on the water in the whole plant, causing the grapes to shrink slightly.

What do these hints point to?5 POINTS
SQUASH
5 POINTS
80 POINTS
SEEDS
80 POINTS​

Answers

Answer: Pumpkin

Explanation:

Cucumbers have a lot of seeds but are not squash.

Apples are neither squash nor do they have that many seeds.

Pumpkins are squash and have a lot of seeds so this must be the correct answer.

Melons have a lot of seeds but are not considered squash even though they are related.

Explain why hormones are able to travel through the body but only affect certain cells.

Answers

Answer:

Hormones are able to travel the body but only affect certain cells because only those target cells have receptors for that particular hormone. Some hormones bind to receptors on the surface of target cells. Others enter the cells and bind to receptors in the cytoplasm or nucleus.

Ten grams of hamburger were added to 90 ml of sterile buffer.This was mixed well in a blender. One-tenth of a ml of this slurry
was added to 9.9 ml of sterile buffer. After thorough mixing, this
suspension was further diluted by a 1/100 dilution followed by a
1/10 dilution. One-tenth of a ml of this final dilution was plated
on agar plates. After incubation, 52 colonies were present. How
many colony-forming units were present in the total 10 gram sample
of hamburger?

Answers

Answer:

5.2 × 10 ⁹ cfus

Explanation:

Using the dilution factors

0.1 ml of the final dilution has 52 colonies

1 ml will have approximately 520 colonies

10 ml of the final sample will have 5200 colonies

at 1 / 100 dilution

1 ml of the sample will have 5200 colonies

100 ml of the sample will have 520000 colonies

1 ml of the 0.1 ml + 9.9 ml has 520000 colonies

10 ml will have   5200000

at the second stage of the dilution

0.1 ml of the slurry had 5200000 colonies

1 ml will have 52000000 colonies

10 ml will have 520000000 colonies

100 ml of the initial sample ( 10 grams + 90 ml ) = 5200000000 colonies =

5.2 × 10 ⁹ cfu

Which types of heat transfer involve heat flow from hot objects to colder objects?

Answers

convection, conduction and radiation is the correct answer because heat flows from hot to cold. The heat flows from hot objects to cold objects whether the heat transfer is occurring by convection, conduction, or radiation.   Heat flows from warmer substances to cooler substances until they reach the same temperature.

Which of the following statements is true? Viruses do not cause communicable diseases. Vaccines are 100 percent effective in preventing disease. Communicable disease can be spread by inanimate objects, such as doorknobs. The best way to prevent catching a cold is to get yearly vaccinations.

Answers

Answer is Communicable disease can be spread by inanimate objects, such as doorknobs.

The causal organisms of some of the communicable diseases are bacteria and viruses. The communicable diseases such as common cough and cold can be transmitted to a healthy person by indirect contact with contaminated substances such as food, air, soil, feces, equipment, objects including doorknobs, remote controller, etc.

diseases can be spread from doorknobs

Now that you have come up with an equation that describes the relationship between amounts of different nucleotide bases in DNA, can you use it to predict the amounts of all four nucleotide bases when you only know the amount of one type of base? Approximately 21% of the human genome is comprised of nucleotides containing C. Given this information, calculate the percentage of the human genome that is comprised of nucleotides containing G, T, and A. (a) _____% of the human genome is comprised of G.(b) _____% of the human genome is comprised of T.

(c) _____% of the human genome is comprised of A.

Enter your answer as three numbers separated by commas (example: 12, 26, 32).

Answers

Answer:

The correct answer will be- 21, 29, 29

Explanation:

In a DNA sequence, the nucleotide base pairs on one strand of DNA are  complementary to the base pair on other strand of DNA.

According to the Chargaff rule, Adenine binds Thymine and Cytosine binds Guanosine which shows that the amount of A will equal T and the amount of G will equal C.

Therefore, when the amount of C is 21%, then the amount of G will be 21%.

To find amount of AT= 100-GC

                              AT= 100-42

                                AT= 58%

So, AT/2= 29% each

Thus, A=T= 29%

          G=C=21%