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RSB [31]
3 years ago
11

After allowing phages grown with bacteria in a medium that contained 32p and 35s, hershey and chase used a centrifuge to separat

e the phage ghosts from the infected cell. they then examined the infected cells and found that they contained _____, which demonstrated that _____ is the phage's genetic material.
Biology
1 answer:
yaroslaw [1]3 years ago
7 0
They then examined the infected cells and found that they contained labeled DNA, Since the phage DNA entered the infected cell, which demonstrated that it makes sense that DNA is the phage's genetic material. A bacteriophage or a phage is a virus that infects and replicates within Bacteria and Archaea. Phages replicate within the bacterium following the injection of their genome into its cytoplasm. 
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Which DNA fingering technique examines the length variation of DNA repeat sequences in human DNA?
DiKsa [7]

Answer: The question is incorrect, below is the correct question

Which DNA FINGERPRINTING technique examines the length variation of DNA repeat sequences in human DNA?

The correct answer to the question is option D

mtDNA (mitochondrial DNA) analysis

Explanation: DNA fingerprinting technique is a laboratory technique used by geneticists.it entails placing of DNA samples into wells,these wells are then placed in a slab of gels and thereafter passing a current through the gel.This is done to ascertain the uniqueness of a DNA pattern and thus be able to differentiate people of same species.

There are several methods of DNA fingerprinting as outlined in the options given with the question.

In mtDNA (mitochondrial DNA) analysis,The Genetic samples are extracted from the biological materials, these samples extracted are total genomic DNA like hair,tooth or samples of blood, Several copies of these genomic DNA are then produced using a polymerase chain reaction and flanking primers inorder to examines the length variation of DNA repeat sequences in human DNA.

5 0
3 years ago
You are looking under a microscope at a dividing cell. You notice
Nataly_w [17]

Answer:

Prophase.

Explanation:

Prophase is the phase of mitosis in which chromatin condenses into chromosomes, the nuclear  membrane is started to break down and the forming of spindle has started . Prophase is the first stage of mitosis which occurs after G2 portion of interphase. After prophase, metaphase, anaphase, and telophase occurs that completes the cell division process and the one parent cell divides into two daughter cells.

7 0
3 years ago
4. The diagram below represents one possible immune response that can occur in the human body.
krek1111 [17]

Answer:

A and C only

Explanation:

I'm sorry I don't know how to explain it but trust me its A and C only.

8 0
3 years ago
Which of the following best describes a tissue?
maksim [4K]

Answer:

A group of similar cells that serve the same purpose.

Explanation:

a group of the same cells makes a tissue.

7 0
3 years ago
Read 2 more answers
I need the function of all of these cell organelles:
Alchen [17]
Nucleus - regulates all cell activity, and also holds the DNA

Smooth endoplasmic reticulum - lipid and carbohydrate synthesis.

Rough er - produces and modifies proteins
Located next to the nucleus

Golgi apparatus - <span>modify, sort, and package macromolecules for cell secretion </span>

Ribosome - <span> assembles the twenty specific amino acid molecules to form the particular protein molecule</span>

Mitochondria - converts energy into compounds that are easier for the cell to use

Chloroplast -<span> captures the energy from sunlight and converts it into food that contains chemical energy in a process called photosynthesis</span>

Lysosomes - breaks down, recycles macromolecules (lipids, carbohydrates, and proteins)

Perioxisome - where hydrogen peroxide and other harmful molecules are broken down by enzymes

Plasma membrane - controls the kinds and amounts of substances moving into and out of the cell; helps maintain cytoplasmic volume and composition

Cytoskeleton - structurally supports, impacts shape and moves cell and its componants

Centrioles - two perpendicular cylinders that form mitotic spindle fibers and microtubules for cilia and flagella, helps organize cell division

Cytoplasm - holds all organelles in place

Vacuole - stores water, salts, protein, and carbohydrates

Vesicles - <span>contains substances that recently entered the cell. Stores and transports newly synthesized molecules.</span>

Cell wall - supports and protects the cell, rigid barrier
6 0
3 years ago
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