Please help me to do this thank you

1 .Electrophoresis is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size and electrical charge.

2.Gel electrophoresis is a technique used to separate DNA fragments (or other macromolecules, such as RNA and proteins) based on their size and charge.

... [All DNA molecules have the same amount of charge per mass. Because of this, gel electrophoresis of DNA fragments separates them based on size only.]

3.Gel electrophoresis [ pls chck tiz answer!]

4.DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode. Shorter strands of DNA move more quickly through the gel than longer strands resulting in the fragments being arranged in order of size.

5.A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable.

High-quality buffers are an important part of electrophoresis. They allow a current to be carried through the sample while resisting pH changes in the overall solution.

Which of the following does NOT indicate a chemical reaction occurred?

A
A gas being produced

B
A solid being formed

C
A change in temperature

D
Temperature staying the same

5. Which of the following about Mendel's Law of Segregation is false?
a. It states that each of two alleles for a given trait segregate into different
gametes

This is the chemical reaction that occurs duting photosynthesis, identify which of these is a product in this chemical
reaction

This happens when water vapor rises, cools off then gets closer together and forms clouds.


HELLLPPP

What is medication? Choose all that apply.

a medicine or drug
comes only in tablets
an agent to cure
an aid for diagnosis

What is the answer for this one?

describe why the marine environment is the least stressful for cells to survive in.​

Which of the following structures have a role in plant reproduction?
-cones, fruit, seeds, flowers
-cones, flowers, roots, stems
-fruit, stems, seeds, stomata
-stomata, cambia, leaves, fruit

Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree.

A genetic pedigree is shown. The parents of Irena have alleles of Upper X Superscript Upper H baseline Upper Y and Upper X superscript Upper H baseline Upper X Superscript h.

In the pedigree that is shown, which represents Irene's allele combination?
XhXh
XHXh
XHXH
XhY

Fermentation does not produce ATP. Why is fermentation such an important process in cells

3. How is this process similar to runners and tubers?

What is the approximate length of the geologic time scale?

Mary Jane's red hair is a recessive trait. If Peter is heterozygous for hair color, what is the chance their baby will have red hair?

A: 3/4
B: 2/4
C: 1/4
D: 0

How are resources allocated?

A scientist has been tracking and studying a population of deer in Yellowstone National Park. He surveys the population every six months. Usually, the population is thriving and has a gene pool with a wide variety of traits. But during one six-month period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had decreased significantly. Which of the following is most likely the event that occurred to change the population? Yellowstone National Park expanded its borders. A population of wolves was introduced into Yellowstone National Park. The amount of disease in the deer population decreased. More grass and shrubs were planted in Yellowstone National Park.

Four groups of students plan scientific investigations to answer four questions for the science fair. Which question would most likely be answered with an experimental investigation? 1 2 3 4

you are pushing a box to the right with a force of 15n. The friction from the floor opposes the movement with a force of 5n. What is the net force

I need help on this question

What phase of the cell cycle does DNA replication occur?

a
G1
b
S
c
G2
d
M
e
cytokinesis

When plants need to store the extra glucose they make during photosynthesis, they join the glucose molecules together to make

A dam created with waste rock from surface mining is called a(n) __________.
A)
interglacial period
B)
valley fill
C)
placer deposit
D)
sanitary landfill
E)
ore deposit

Lesson Worksheet
Multiple Choice
Circle the letter of the correct choice.

1 Which of the following is the basic unit of matter?
molecule
chemical compound
atom
nucleus

2 Water is an example of a(n)
atom
molecule
ion
native element

3 An atom is only an ion if it has more or less
neutrons than electrons
protons than neutrons
neutrons than protons
electrons than protons

4 An example of a pure element is
table salt
silicon dioxide
sulfur
calcium carbonate

5 The crystal shape of a mineral
shows how the atoms are arranged
will always be the same if it is made from the same atoms
can usually only be seen under a microscope
can help account for how hard or brittle a mineral is

True or False
Write true if the statement is true or false if the statement is false.
_______ 6. A molecule is the smallest unit of an element.
_______ 7. Protons and electrons are found in the nucleus of an atom.
_______ 8. Halides (salts) make up the largest group of minerals on Earth.
_______ 9. Coal and diamonds are different minerals because they have a different structures.
_______ 10. In a crystal, the atoms are arranged in a pattern.
Fill in the Blanks
Fill in the blank with the term that best completes the sentence.
11. 90% of Earth’s crust is made of minerals in the group called a(n) ______________________.
12. The _______________ makeup of a material is the different atoms and molecules that it is composed of.
13. Even though calcium carbonate is made by marine animals, it is still ____________________.
14. ___________________ is the substance of which physical objects are made.
15. Electrically neutral particles are called _________________.
Short Answer

2 for 1!!! PLEASE HELP
The nucleotide not found in RNA is:
Adenine
Thymine
Guanine
Cytosine
Uracil
---------------------------------------------------
The five carbon sugar found in DNA is:
Deoxyribose
Ribose
Glucose
Fructose

What are the uses of the energy provided by ATP in the living cells?

Describe how an organism is classified currently hy Biologist

Sara is watching television when the power goes out. When she walks to the kitchen to get a candle, she knocks over a chair. She lights a match and holds it to the wick of the candle. She uses the light from the candle to find her way to the chair, which she picks up and sits in. Which of the events was a chemical change? *

Explain the concept Conservation of Matter

Identify three factors that affect the Jet Stream.

Would a cross of two
dwarf-height pea plants pro-
duce regular-height offspring?
Hint: Use a Punnett square to
determine the answer

When does the mountain banshee become prey?