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- Question
Which formula represents an amino acid?
Options- A. R-CH3(NH2)-COOH
- B. R-CH(NH2)-COOH
- C. R-CH2(NH2)-COOH
- D. R-CH3(NH2)-COH
- Correct Answer
- R-CH(NH2)-COOH
ExplanationAmino acids are the building blocks of proteins. There are about 21 essential amino acids in the human body like histidine, leucine, lysine... The general formula for amino acid is R-CH(NH2)-COOH.
- 1. Which of these best describes genetic drift?
Options- A. Random fluctuations in the gene frequencies within a population Eliminate
- B. The combining of alleles to create more genetic variations within a population
- C. The movement of alleles between population
- D. A planned method to reduce the number of inferior genes in a population Discuss
- 2. What is the unit of heredity?
Options- A. cell
- B. blood
- C. gene
- D. All of the above Discuss
- 3. ACTH stimulates the adrenal cortex to release corticosteroid hormones.
Options- A. TRUE
- B. FALSE Discuss
- 4. The principle of dominance states that
Options- A. Some alleles are dominant, while others are recessive
- B. All alleles are recessive
- C. All alleles are dominant
- D. Alleles are neither dominant nor recessive Discuss
- 5. Salts and sugars work to preserve foods by creating a
Options- A. Hypertonic environment
- B. Lower pH
- C. Depletion of nutrients
- D. Lower osmotic pressure Discuss
- 6. In a nucleosome, the DNA is wrapped around
Options- A. histone octamer
- B. helix
- C. double helix
- D. None of the above Discuss
- 7. Bone strength in later life depends on
Options- A. the formation of dense bones during youth
- B. the increased calcium absorption in the elderly
- C. the increased production of estrogen after menopause
- D. reducing physical activity to protect bones Discuss
- 8. An important function of fat in the body is to
Options- A. Protect vital organs
- B. Stores energy
- C. Insulate us
- D. All of the above Discuss
- 9. Cranial bones develop
Options- A. within fibrous membranes
- B. within osseous membranes
- C. from cartilage models
- D. from a tendon Discuss
- 10. Study of Life in outer space is known as
Options- A. Endobiology
- B. Neobiology
- C. Exobiology
- D. Intrabiology Discuss
Biology problems
Search Results
Correct Answer: Random fluctuations in the gene frequencies within a population Eliminate
Explanation:
Random fluctuations in the gene frequencies within a population Eliminate is the one which best describes genetic drift.
Correct Answer: gene
Explanation:
Genes are units of heredity.
Correct Answer: TRUE
Explanation:
ACTH means Adrenal Corticotrophic Hormone.
CRH - Corticotrophin Releasing Hormone produced by hypothalamus stimulates the pituitary gland to release the ACTH which in turn produces corticosteroid hormones by adrenal glands.
Hence, the given statement is TRUE.
Correct Answer: Some alleles are dominant, while others are recessive
Explanation:
The principle of dominance states that some alleles are dominant, while others are recessive.
Correct Answer: Hypertonic environment
Explanation:
Salts and sugars work to preserve foods by creating a Hypertonic environment.
Correct Answer: histone octamer
Correct Answer: the formation of dense bones during youth
Correct Answer: All of the above
Correct Answer: within fibrous membranes
Correct Answer: Exobiology
Explanation:
Study of Life in outer space or search of life external to Earth is known as Exobiology.
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