DNA replication worksheet
Original strand

The given statement "Avery et al. (1944) determined that DNA is the genetic material in T2 bacteriophage" is false. Avery et al. (1944) determined DNA is the genetic material in bacteria, not T2 bacteriophage.

The statement is false because Avery, MacLeod, and McCarty's 1944 experiment demonstrated that DNA is the genetic material in bacteria, specifically Streptococcus pneumoniae.

They showed that the transformation principle, which allowed non-virulent bacteria to become virulent, was due to the presence of DNA.

The discovery that DNA is the genetic material in the T2 bacteriophage was made by Hershey and Chase in their famous 1952 experiment using radioisotopes to track the transfer of genetic material.

They found that only DNA, and not protein, entered the bacterial host cell, confirming its role as genetic material.

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Answer:

Abstract. A leaf develops from a few cells that grow, divide, and differentiate to form a complex organ that is precisely positioned relative to its neighbors. How cells communicate to achieve such coordinated growth and development is the focus of this review.

Answer: The modern cell theory are in following ways:-

(1) All known living things are made up of one or more cells.

(2)  All living cells arise from pre-existing cells by division.

(3) The cell is the fundamental unit of structure and function in all living organisms.

(4) The activity of an organism depends on the total activity of independent cells.

(5) Energy flow (metabolism and biochemistry) occurs within cells.

(6) Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and cytoplasm.

(7) All cells are basically the same in chemical composition in organisms of similar species.

Explanation:

Answer:

The event that precipitated exponential human population growth is called the. Industrial Revolution.

The statement is true. Km (Michaelis constant) is a value that represents the substrate concentration at which an enzyme system achieves half of its maximum velocity (Vmax).

The Michaelis-Menten equation describes the relationship between substrate concentration and enzyme activity, and Km is a key parameter in this equation. When the substrate concentration is equal to Km, the enzyme is working at half of its maximum velocity. As the substrate concentration increases above Km, the enzyme reaches higher velocities until it reaches Vmax, the maximum velocity of the reaction. It is a parameter used to characterize the substrate-enzyme interaction and provides information about the affinity of the enzyme for its substrate.

Therefore, the statement that Km is a value that tells you the 1/2 maximal velocity of a given enzyme system is true. Km provides insights into the substrate concentration required for the enzyme to achieve significant activity and is an important kinetic parameter used to study enzyme kinetics and understand enzyme-substrate interactions.

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Answer:

3

3

they are parallel

Explanation:

i did the lesson

Answer:

3.  (a) the amount of energy found in the fatty acid.

4. (d) all of the above

5. (c) DNA is how inherited characteristics are passed from one generation to the next.

6. (b) lipid

7. (c) cellulose

Explanation:

3. Saturated fats have more energy due to the double bonds that are found in the molecules.

4. Different proteins have various and roles within the cell.

5. Each nucleotide, in turn, is made up of a nitrogenous base (not carbon base), a pentose sugar, and a phosphate. DNA is a double chain.

6. Biological membranes consist of a continuous double layer of lipid molecules in which membrane proteins are embedded.

7. The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides.

Answer:

B). At a convergent plate boundary, the oceanic crust is pulled beneath the continental crust, where magma forms and moves upward.

Explanation:

Volcano is described as the fissure in the crust of the earth through which the molten rock, lava, or hot gases are allowed to escape from this chamber. The second option most appropriately states that 'the oceanic crust is pulled beneath the continental crust at a convergent plate boundary where the formation of magma takes place and makes it to the surface(through eruption in the form of lava).' The process can have both the creative as well as destructive impacts as it brings a lot of useful minerals that makes the soil rich and fertile while on the other hand, the ash is fatal for the environment. Thus, option B is the correct answer.

The statement which best describes the formation of volcanoes is: B.  At a convergent plate boundary, the oceanic crust is pulled beneath the continental crust, where magma forms and moves upward.

A volcano can be defined as a mountain or hill that has a large circular or conical hole at the top through which volcanic ash, rock fragments, gases, dust, hot lava, steam etc., are expelled from the vent of a planetary-mass object, either at regular intervals or continuously.

A convergent plate boundary refers to a boundary where two (2) plates move towards each other, thereby, resulting in subduction or collision.

As a result of the oceanic crust being pulled beneath the continental crust at a convergent plate boundary, molten magma are formed and then moved upward as volcanoes.

In conclusion, the collision between two (2) plates as a result of subduction causes an oceanic crust to be forced underneath the mantle, thereby, forming volcanoes.

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Answer:

DNA

Explanation:

All these events occur with the golgi apparatus and endoplasmic reticulum. All these terms have to do with genetic coding and how that genetic coding sends directions to the organelles inside the cell.

that ABO blood type demonstrates multiple allele inheritance of what multiple allele inheritance means. In humans, the ABO blood type is determined by three alleles - A, B, and O. Each person one from each parent, and the are combination  these two alleles determines their blood type.

The A and B alleles are co-dominant, meaning they both express their phenotype when present together. The O allele is recessive and only expresses its phenotype when paired with another O allele. This results in four possible blood types - A, B, AB, and O. So, the inheritance of ABO blood type involves multiple alleles interacting in a complex way to determine a person's phenotype.

The ABO blood type is a trait that demonstrates the type of inheritance known as "codominance." the term are we the "codominance" refers to the type of inheritance exhibited by the ABO blood type  codominance, both alleles for are specific trait are expressed equally in an individual's phenotype, and neither allele is masked or dominates the other. The explanation for this is that ABO blood types have three alleles (A, B, and O), with both the A and B alleles being dominant over the O allele, and the A and B alleles are codominant with each other, leading to four possible blood types: A, B, AB, and O.

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An average of about 1% of erythrocytes are removed from circulation per day.

An average of about 1% of erythrocytes are removed from circulation per day. Erythrocytes, also known as red blood cells, have a lifespan of around 100-120 days, so approximately 1% of them are removed daily to maintain a balance in the circulatory system.

The average lifespan of erythrocytes (red blood cells) in circulation is around 120 days. During this time, approximately 1% of these cells are removed from circulation each day, which means that around 1% of the total erythrocyte population is being removed every day. Therefore, the approximate number of erythrocytes removed from circulation per day is around 1% of the total erythrocyte population, which varies depending on the individual's age, gender, and health status.

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The properties that allow this are the carbon's four valence electrons, and the fact that they can bond with other carbon atoms.

RNA polymerase initiates the process of transcription by binding to the promoter site on DNA. It undergoes several stages before transitioning from abortive initiation to promoter clearance, which is a crucial event for efficient transcription. The molecular events that must occur for this transition are discussed below:

Abortive initiation is the process by which RNA polymerase repeatedly initiates and releases short RNA sequences of 2-3 nucleotides. This process allows the polymerase to overcome kinetic barriers and achieve promoter clearance.

For RNA polymerase to transition from abortive initiation to promoter clearance, several molecular events must occur. Initially, the polymerase forms a closed complex with the DNA promoter region, which is a non-productive complex. It then undergoes structural rearrangement to form an open complex, exposing the DNA template strand to the active site of the polymerase. The open complex is highly unstable and prone to dissociation.

The next step is the formation of a short RNA transcript, which stabilizes the open complex. After the formation of a 9-10 nucleotide long RNA transcript, the polymerase enters the process of promoter clearance, wherein the transcript serves as a proofreading checkpoint.

At this point, RNA polymerase transitions from the promoter-bound state to the elongation phase of transcription, where it dissociates from the promoter and moves along the DNA template strand, synthesizing RNA in the 5' to 3' direction. The process of promoter clearance is a crucial step for efficient transcription, and it is regulated by various factors such as transcription factors, chromatin remodeling complexes, and post-translational modifications of RNA polymerase.

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Answer:

Genes encode proteins and proteins dictate cell function. Therefore, the thousands of genes expressed in a particular cell determine what that cell can do. In addition, the way in which a cell processes its RNA transcripts and newly made proteins also greatly influences protein levels. ..

Explanation:

Answer:

One gene for a particular trait is transcribed from DNA during transcription.

The code for the gene is transferred by mRNA to the ribosome for protein production to begin.

Proteins are constructed from a polypeptide chain of amino acids.

Once the polypeptide chain is constructed, a protein is produced and the trait can be expressed.

Explanation:

edg 2022

Answer:

Phanerograms (Phanerogramae)

Explanation:

The seed bearing plants can be classified into two groups: Gymosperms and Angiosperms. The gymnosperms generally have hidden seed and angiosperms have special reproductive organs like flowers. They also show double fertilization and triple fusion.

The Program for Alternative Learning (PAL) develops human resources through vocational training and skills development programs.

PAL offers vocational training programs that equip individuals with practical skills and knowledge in various fields, enabling them to pursue employment opportunities and contribute to the workforce. Additionally, PAL provides opportunities for personal and professional growth through workshops, seminars, and mentoring, fostering the development of essential skills and qualities required in the job market.

PAL's focus on vocational training and skills development programs demonstrates its commitment to nurturing and enhancing human resources. By equipping individuals with valuable skills and providing them with opportunities for personal and professional growth, PAL plays a vital role in empowering individuals, enhancing employability, and contributing to the development of human resources in the community.

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Answer:

Double (x2)

Explanation:

To have enough DNA for each gamete, the DNA in the germ cell must be doubled (× 2).

DNA REPLICATION:

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Glial cells play multiple roles in the brain. They provide structural and metabolic support to neurons, helping to maintain the brain's overall function. All of the answers are correct.

Glial cells are non-neuronal cells found in the central nervous system (CNS) and peripheral nervous system (PNS). They make up a significant portion of the brain and play essential roles in supporting and protecting neurons. While neurons are responsible for transmitting electrical signals and information processing, glial cells provide structural, metabolic, and functional support to neurons.

Glial cells are responsible for maintaining the homeostasis of the brain's extracellular fluid, ensuring a stable environment for neuronal activity. Additionally, glial cells guide neurons during growth and repair processes, contributing to the development and maintenance of neural connections. These diverse functions highlight the crucial role of glial cells in supporting and regulating the intricate workings of the brain.

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Part of the left temporal lobe is responsible for language comprehension in most persons. Wernicke (receptive) aphasia occurs when this region is injured, causing severe difficulties with both word recall and language comprehension.

Damage to the right temporal lobe has been linked to difficulties remembering sounds and music. Due to this, some people may find it difficult to sing.

Brain connection is crucial. Your brain communicates internally and externally using electrical and chemical impulses. Brain lesions impede brain transmission. Disruption increases with damage severity.

Brain lesions are damaged tissue. Brain traumas or diseases create this harm. Brain lesions include strokes. Lesions can affect brain function, causing weakness, sensory disruption, and disorientation.

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Answer:

extinct

dormant (Haven't erupted in 4/6yrs

The answer is the letter D. type O

The blood type O contains both the anti-A and anti-B antibodies in their plasma. Antigens are protein molecules that are found on the surface of red blood cells and they are involved in the natural defense of the body. They have the ability to recognize foreign substances including germs and aerts the

Answer:

Size, shape, temperature

Explanation:

Water creates pressure inside the cell that helps it maintain shape. ... Without water, cell membranes would lack structure, and without proper membrane structure, cells would be unable to keep important molecules inside the cell and harmful molecules outside the cell.

The two main kinds of membrane transport proteins are carrier proteins and channel proteins.

There are typically two types of transport carried out by transport proteins: "facilitated diffusion," in which a substance is simply allowed to diffuse down its concentration gradient, and "active transport," in which a cell uses energy to move a substance in the opposite direction of its concentration gradient.

The specific solute to be transported is bound by carrier proteins (also known as carriers, permeases, or transporters), which then go through a series of conformational changes to move the bound solute across the membrane. Facilitated diffusion is the method by which these molecules travel across the membrane with the aid of specific transport proteins. These distinct proteins are connected to what are known as channel proteins or carrier proteins (Figure below).

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Answer:

Biotic

Explanation:

Answer:

A

Explanation:

Renewable resources are readily replenishable despite being used frequently or infrequently.

The effect on photosynthesis of chlorophyll b is that it greatly increases the proportion of the photons in sunlight that plants can harvest; the correct option is A.

Photosynthesis is the process by which plants use the energy of sunlight to convert carbon dioxide and water present in the atmosphere to sugar molecules.

Photosynthesis takes place in the leaves of plants.

The cells of the leaves of plants contain the cell organelle chloroplast which is the site of photosynthesis.

The chloroplasts contain special green pigments which trap and absorb the energy of sunlight and transfer it to biomolecules within the cells that then produce ATP.

In higher plants, chlorophyll exists in the forms chlorophyll a and chlorophyll b.

Chlorophyll b helps to trap the photons of light during photosynthesis.

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Hybrids hide one expression of a trait that reappears when hybrids are self-crossed because of segregation.

Segregation refers to the separation or sorting of different alleles during the formation of gametes (reproductive cells). In hybrids, one allele for a specific trait may be dominant and masks the expression of the recessive allele.

However, when hybrids are self-crossed, the alleles segregate during gamete formation, resulting in the re-emergence of the hidden trait. This is due to the fact that each parent contributes one allele for each trait to their offspring, and during meiosis, the alleles segregate independently into different gametes. As a result, the hidden trait can reappear in the offspring of the self-crossed hybrids.

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The correct question is:

Fill in the blanks:

Hybrids hide one expression of a trait that reappears when hybrids are self-crossed because _________.

Answer:

A would be your answer

Explanation:

Answer:

I would say A. If there are no mice in an ecosystem, a rattlesnake moves to another ecosystem. This seems to fit what a hypothesis is :)