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- Question
Which base is found only in RNA?
Options- A. Thyamine
- B. Adenine
- C. Uracil
- D. Cytosine
- Correct Answer
- Uracil
- 1. Protists and bacteria are grouped into different domains because
Options- A. protists have a membrane-bounded nucleus, which bacterial cells lack.
- B. protists eat bacteria
- C. bacteria decompose protists
- D. protists are photosynthetic Discuss
- 2. Innate immune system defenses include
Options- A. phagocytosis
- B. B cells
- C. plasma cells
- D. T cells Discuss
- 3. The temperature danger zone for food is
Options- A. 5 - 63 deg
- B. above 45 deg
- C. below 15 deg
- D. None of the above Discuss
- 4. Which RNA base pairs with the adenine in DNA?
Options- A. Thymine
- B. Cytosine
- C. Both A & B
- D. Uracil Discuss
- 5. What is the structural unit of compact bone?
Options- A. Osteon
- B. Spongy bone
- C. Lamellae
- D. Periosteum Discuss
- 6. Skin is an example of what type of tissue?
Options- A. epithelial
- B. connective
- C. nervous
- D. All of the above Discuss
- 7. Receptors for hearing are located in the
Options- A. Vestibule
- B. Tympanic membrane
- C. Semicircular canals
- D. Cochlea Discuss
- 8. What are the four bases that make up DNA? Discuss
- 9. Which of the following is a risk factor for osteoporosis?
Options- A. Smoking cigarettes
- B. Drinking alcohol
- C. Both A & B
- D. None of the above Discuss
- 10. Which statements about viruses are true?
Options- A. HIV contains reverse transcriptase.
- B. A retrovirus contains RNA.
- C. Both A & B
- D. All RNA-containing viruses are retroviruses. Discuss
Biology problems
Search Results
Correct Answer: protists have a membrane-bounded nucleus, which bacterial cells lack.
Correct Answer: phagocytosis
Correct Answer: 5 - 63 deg
Explanation:
The temperature danger zone for the food that cannot be stored for long time is between 5 degrees to 63 degrees centigrade.
Correct Answer: Uracil
Explanation:
In DNA, adenine pairs with Thymine. Similarly, in RNA, due to absence of thymine in RNA and the same structure with uracil helps to pair with adenine.
Correct Answer: Osteon
Correct Answer: epithelial
Explanation:
Epithelial tissue is made of layers of cells that cover the surfaces of the body that come into contact with the exterior world, line internal cavities, and form glands.
The four types of tissue in the body are epithelial, connective, muscle, and nervous.
Correct Answer: Cochlea
Correct Answer: A DNA is made up of four bases called Adenine, Thymine, Cytosine and Guanine
Correct Answer: Both A & B
Explanation:
Osteoporosis makes you more likely to loss bone mass and density resulting in fractures. Smoking cigarettes and drinking alcohol can lead to loss bone mass and density. Oseoporosis is more common in women than men.
Correct Answer: Both A & B
Explanation:
The statements true about viruses are :
1. The capsid enters the host cell if the virus is enveloped.
2. Enveloped viruses bud from the host cell.
3. HIV contains reverse transcriptase.
4. A retrovirus contains RNA.
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