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- Question
What base is found in RNA but not in DNA?
Options- A. Uracil
- B. Cytosine
- C. Adenine
- D. Guanine
- Correct Answer
- Uracil
- 1. What three statements make up the cell theory?
Options- A. All living things are made up of cells.
- B. New cells come frome exisiting cells.
- C. Cells are the basic unit of structure/function in living things.
- D. All of the above Discuss
- 2. Transcription occurs in the
Options- A. DNA
- B. Cytoplasm
- C. Chromosomes
- D. Nucleus Discuss
- 3. Where are chromatids found in a cell?
Options- A. Anaphase
- B. Metaphase
- C. Prophase
- D. None of the above Discuss
- 4. All cells divide at the same rate.
Options- A. TRUE
- B. FALSE Discuss
- 5. Which part of the respiratory system does emphysema damage?
Options- A. Nose
- B. Lungs
- C. Trachea
- D. Mouth Discuss
- 6. Air in the pleural cavity is called a pneumothorax.
Options- A. TRUE
- B. FALSE Discuss
- 7. Which of the following statements is not true about metabolism?
Options- A. Younger people generally have a slower metabolism than adults.
- B. Basal metabolism is the amount of energy needed for sustaining life.
- C. Basal metabolism is measured by the amount of calories burned when your body is inactive.
- D. Metabolism is influenced by numerous factors, such as heredity and age. Discuss
- 8. Which best describes Genes?
Options- A. long, double chains of nucleic acids.
- B. long, single chains of amino acids.
- C. long, single chains of nucleic acids.
- D. long, double chains of amino acids. Discuss
- 9. What is the purpose of the sigmoid colon? Discuss
- 10. Which of the following is true of kinetochores?
Options- A. They are the primary centrosome structures that maintain the attachment of the sister chromatids prior to mitosis.
- B. They are the sites at which microtubules attach to chromosomes.
- C. They are located at the center of the centrosome and organize tubulin into spindle fibers.
- D. They cross at the cell's equator and move against each other, causing the cell to elongate. Discuss
Biology problems
Search Results
Correct Answer: All of the above
Explanation:
The three statements make up the cell theory are::
1. All living things are made up of cells.
2. Cells are the basic unit of structure/function in living things.
3. New cells come frome exisiting cells.
These cells can vary widely, but all living things are composed of cells.
Correct Answer: Nucleus
Correct Answer: Metaphase
Explanation:
A chromatid is one copy of a newly copied chromosome which is still joined to the original chromosome by a single centromere.
The two identical copies?each forming one half of the replicated chromosome are called chromatids.
Chromonema is the fibre-like structure in prophase in the primary stage of DNA condensation. In metaphase, they are called chromatids.
Correct Answer: FALSE
Explanation:
The given statement that all cells divide at the same rate is FALSE.
No, all cells do not divide at the same rate. Cells that require frequent replenishing, such as skin or intestinal cells, may only take roughly twelve hours to complete a cell cycle. Other cells, such as liver cells, remain in a resting state (interphase) for up to a year before undergoing division.
Correct Answer: Lungs
Explanation:
Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung i.e, primarily causes shortness of breath due to over-inflation of the alveoli.
First, emphysema causes holes to gradually form inside the lungs' air sacs, thereby weakening their internal structure and inhibiting the exchange of oxygen and carbon dioxide.
Correct Answer: TRUE
Explanation:
Air or gas can build up in the pleural space and when this happens, it's called a pneumothorax.
Hence the given statement is TRUE.
Correct Answer: Younger people generally have a slower metabolism than adults.
Explanation:
Metabolism is the set of life-sustaining chemical transformations within the cells of organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes.
Younger people have faster metabolism than adults. Hence, the given statement 'Younger people generally have a slower metabolism than adults' is FALSE.
Correct Answer: long, double chains of nucleic acids.
Explanation:
Gene is a segment of chromosomal DNA or a sequence of DNA or RNA that codes for a molecule that has a function. It is the basic physical and functional unit of heredity.
As genes are made up of DNA it impies that they are long, double chains of nucleic acids as DNA is made of nucleic acids.
Correct Answer: Sigmoid colon or pelvic colon is a curved, S-shaped portion of the large intestine which is closest to the rectum and anus * It helps to transports fecal matter from the descending colon to the rectum and anus * It is the final segment of the colon
Correct Answer: They are the sites at which microtubules attach to chromosomes.
Explanation:
They are the sites at which microtubules attach to chromosomes.
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