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- Question
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.
- Correct Answer
- They are the sites at which microtubules attach to chromosomes.
ExplanationThey are the sites at which microtubules attach to chromosomes.
- 1. What is the purpose of the sigmoid colon? Discuss
- 2. 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
- 3. 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
- 4. Air in the pleural cavity is called a pneumothorax.
Options- A. TRUE
- B. FALSE Discuss
- 5. What base is found in RNA but not in DNA?
Options- A. Uracil
- B. Cytosine
- C. Adenine
- D. Guanine Discuss
- 6. Which one of the following is true of tRNAs?
Options- A. tRNAs are double-stranded.
- B. There are four types of tRNA.
- C. Each tRNA binds a particular amino acid.
- D. All of the above Discuss
- 7. Non-Gonococcal Urethritis is most often caused by
Options- A. chlamydia
- B. gonorrhea
- C. progesterone
- D. herpes genitalis Discuss
- 8. The schwann cell forms a myelin sheath around the
Options- A. nodes of Ranvier
- B. dendrites
- C. nucleus
- D. axon Discuss
- 9. Major fructose sources include
Options- A. Fruit juices
- B. Corn syrup
- C. Honey
- D. All of the above Discuss
- 10. In recombinant DNA methods, the term vector can refer to
Options- A. the sticky end of a DNA fragment
- B. a plasmid used to transfer DNA into a living cell
- C. a DNA probe used to identify a particular gene
- D. the enzyme that cuts DNA into restriction fragments Discuss
Biology problems
Search Results
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: 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: 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: 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: Uracil
Correct Answer: Each tRNA binds a particular amino acid.
Explanation:
tRNA abbreviated as A transfer RNA is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.
Correct Answer: chlamydia
Explanation:
Chlamydial infection is very common in both males and females.
NGU (Non-Gonococcal Urethritis) is an infection of the urethra caused by pathogens (germs) other than gonorrhea.
Several types of germs cause NGU. The most common and serious is chlamydia.
Correct Answer: axon
Explanation:
Schwann cells or neurolemmocytes are the cells in the peripheral nervous system that form the myelin sheath around a neuron's axon.
Correct Answer: All of the above
Explanation:
Major fructose sources include all fruits and honey.
Correct Answer: a plasmid used to transfer DNA into a living cell
Explanation:
The term 'Vector' in recombinant DNA methods, refers to a plasmid or other agent used to transfer DNA into a living cell.
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