Answers
Answer:
Cytosine and deoxyribose sugar
Explanation:
i took the 7.01-7.03 quiz on k12 and got 100%
Actually Welcome to the Concept of the Biology
The components that bond with nitrogenous vase, guanine, in a section of double-stranded DNA is
B.) Deoxyribose Sugar, Phosphate and Thymine.
Related Questions
Transposons need to __________________ in order to limit their negative impact on the genome of the host cell. A. control their nucleotide length B. regulate their copy number C. control their target-site choice D. avoid transposing into their own genome
What is enzyme, a substrate and competitive enzyme inhibition?
Compounds formed from the attraction of oppisitely charged ions are called ________.A. covalent compoundsB. ionic compoundsC. mineral compoundsD. molecular compounds
1. What is the equation for the equilibrium constant, Keq, for the following general reaction: aA + bB → cC + dD Define each term in the equation. 2. What is the actual free energy change of the reaction above? Again, define each term in the equation. Express this equation in terms of mass action Q 3. What is the standard free energy change of the reaction above? Again, define each term.
A) The plant should be shared with the smaller islands.
B) The plant should be fed to the native livestock on the island.
C) The plant should be uprooted from all regions in the island.
D) The plant should be cross-bred with deeper-rooted plants.
2). In the Everglades, a system of canals and levees diverts water to urban areas and the Everglades National Park. This water management system has caused changes in the natural flow of the water during the wet and dry season. Wading birds are especially sensitive to wet and dry seasonal changes. How have water cycle disruptions MOST likely affected wading birds?
A) The reduced salinity results in more eggs being laid.
B) The water quality for feeding has been improved by runoff.
C) The release of water dilutes food sources for their young.
D) The higher water levels allow longer-legged birds to survive and reproduce.
3). In Florida, humans have caused more than 2,000 manatee deaths since 1974. Collisions with boats and boat propellers cause roughly twenty-five percent of all manatee deaths. Another significant cause of the declining population is the disappearance of manatee habitats, resulting primarily from coastal development, water quality problems, and the change in water levels caused by Florida’s flood control systems. A constitutional amendment has been proposed that would protect natural systems and biological diversity. Which would be the MOST likely requirement of a constitutional amendment to protect the manatee population?
A) moving manatees to locations outside of the Everglades
B) restricting manatee hunting in the Everglades to certain times of year
C) raising more manatees in captivity
D) placing a limit on speedboat use in manatee habitats
Answers
The BEST method of dealing with the invasive Miconia plant would be to uproot it from all regions of the island (Option C). Water cycle disruptions have most likely affected wading birds by diluting food sources for their young (Option C). The most likely requirement of a constitutional amendment to protect the manatee population would be to place a limit on speedboat use in manatee habitat (Option D).
What is an invasive species?
The invasive Miconia plant is a threat to the native plant species and ecosystem of Hawaii. The plant grows rapidly and has shallow roots, which can cause soil erosion and increase the likelihood of landslides. Sharing the plant with smaller islands or cross-breeding it with deeper-rooted plants may seem like viable solutions, but it is essential to understand that the plant is already invasive and has caused significant harm to the ecosystem. Removing the plant completely is necessary to allow the natural ecosystem to recover and prevent further damage.
Hence, for first question the correct answer is Option C, for second correct answer is Option C, Option D is correct for third question.
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2) D because of the current, short-legged birds might get swept away
3) D because all of the other options would most likely not enforced.
Answers
Answer: Diffusion
Explanation:
The osmosis is explained as the selective permeability of the membranes which allows the movement of the solute from higher concentration to lower concentration.
This is associated with diffusion which can be defined as the random movement of the particles in order to attain equilibrium.
The diffusion allows the movement of the particles and osmosis allows the movement of only selective materials.
b. a river contaminated with the Giardia protozoan
c. a doorknob contaminated with the cold virus
d. an asymptomatic person infected with HIV
e. a mosquito infected with the malaria protozoan
Answers
Answer:
The correct option is: c. a doorknob contaminated with the cold virus
Explanation:
Fomites are the inanimate objects or substances that can get contaminated with the pathogens and are capable of transferring the pathogens to the new hosts.
Sterilization of the possible fomites should be done in order to prevent cross-infection.
Examples of fomites are hair, towels, clothes, door knobs, cups, switches, handrails, remote controls, pens, syringes, bedding, etc.
Answers
Answer:
C
Explanation:
Final answer:
Hydrophobic interactions are the result of strong attractions between nonpolar regions and are crucial in biological phenomenon such as protein folding and cell membrane structure. The correct option is D.
Explanation:
Hydrophobic interactions often occur between nonpolar molecules or groups. The correct statement among those provided is D: hydrophobic interactions are the result of strong attractions between nonpolar regions.
These interactions do not require the presence of surrounding water molecules, nor do they result from maximizing contact with water. Instead, nonpolar molecules or groups tend to gather together, or aggregate, to minimize their exposure to water or any other polar substances.
This is because there is a natural repulsion between polar and nonpolar substances. Thus, hydrophobic interactions are critical for the folding and stability of proteins, cell membrane structure, and many other biological phenomena. The correct option is D.
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A. stains with basic dye methylene blue, has large amounts of histamine in granules, and facilitates allergic responses and inflammation
___basophil
B. stains with acidic dye eosin, has histamine and major basic protein in granules, and facilitates responses to protozoa and helminths
___macrophage
C. recognizes abnormal cells, binds to them, and releases perforin and granzyme molecules, which induce apoptosis
___eosinophil
D. large agranular phagocyte that resides in tissues such as the brain and lungs
Answers
Answer:
1. A natural killer cell identifies unusual cells, combines with them, and discharges perforin and molecules of granzyme that stimulates apoptosis.
2. A basophil comprises huge concentrations of histamine in granules, gets stain with basic dye methylene blue, and helps in inflammation and allergic reactions.
3. A macrophage refers to a huge agranular phagocyte, which is found within the tissues like lungs and brain.
4. An eosinophil comprises histamine and major basic protein in granules gets stain with acidic dye eosin and helps in reactions against the helminths and protozoa.
Final answer:
The natural killer cell recognizes and destroys abnormal cells, the basophil facilitates allergic responses and inflammation, the macrophage is a large cell that resides in tissues, and the eosinophil facilitates responses to certain parasites.
Explanation:
Here is the correct match for each cell type with its description:
- Natural killer cell: C. recognizes abnormal cells, binds to them, and releases perforin and granzyme molecules, which induce apoptosis
- Basophil: A. stains with basic dye methylene blue, has large amounts of histamine in granules, and facilitates allergic responses and inflammation
- Macrophage: D. large agranular phagocyte that resides in tissues such as the brain and lungs
- Eosinophil: B. stains with acidic dye eosin, has histamine and major basic protein in granules, and facilitates responses to protozoa and helminths
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Which complementary DNA strand pairs correctly with the strand above?
A. 5’ CTAGCTAG 3’
B. 5’ GATCGATC 3’
C. 5’ CUAGCUAG 3’
D. 5’ CATCGATC 3’
Answers
Each base pair forms a "rung of the DNA ladder" by joining two complementary DNA nucleotide bases. Two linked strands of DNA form a double helix, which is a structure that resembles a twisted ladder.
What is complementary base pairing in DNA molecule?
Because they are complementary base pairs, adenine binds to thymine while guanine attaches to cytosine. The complimentary bases may unite to form a bond.
This aids in holding the DNA molecule's two antiparallel strands together to form the helix. The complimentary base pairing rule refers to this.
Cytosine pairs with guanine, while adenine pairs with thymine. The two strands are so complimentary to one another.
For instance, a complementary DNA strand will have the nucleotidesequence 5' CTAGCTAG 3' for a DNA strand with the nucleotide sequence 3' GATCGATC 5'.
Therefore, According to this rule, nucleotides A and T and bases G and C are always equally abundant in DNA.
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