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- Question
Which of the following is true of osmosis?
Options- A. it is a type of diffusion
- B. movement is against water's concentration gradient
- C. requires energy
- D. All of the above
- Correct Answer
- All of the above
- 1. The two purines in DNA are
Options- A. Adenine & Thymine
- B. Thymine & Uracil
- C. Guanine & Uracil
- D. Adenine & Guanine Discuss
- 2. Select the correct statement about the ureters.
Options- A. The ureter is innervated by parasympathetic nerve endings only.
- B. Ureters contain sphincters at the entrance to the bladder to prevent the backflow of urine.
- C. The epithelium is stratified squamous like the skin, which allows a great deal of stretch.
- D. The ureters are capable of peristalsis like that of the gastrointestinal tract. Discuss
- 3. Where does digestion of protein begin?
Options- A. Mouth
- B. Pharynx
- C. Stomach
- D. Liver Discuss
- 4. Drugs that combat depression work by Discuss
- 5. The process of copying dna is called
Options- A. Copying
- B. Replication
- C. Repulsion
- D. Replying Discuss
- 6. Where are the proteins of the electron transport chain located?
Options- A. mitochondrial matrix
- B. mitochondrial inner membrane
- C. mitochondrial outer membrane
- D. mitochondrial intermembrane space Discuss
- 7. The functional unit of the nervous system is the
Options- A. Nephrons
- B. Axons
- C. Neurons
- D. All of the above Discuss
- 8. Which organelles are unique to plant cells?
Options- A. Central vacuole
- B. Chlorophyll
- C. Cell wall
- D. All of the above Discuss
- 9. Which of the following is true of enzymes?
Options- A. Enzymes lowers the activation energy for the chemical reaction
- B. Enzymes speed up the rate of a chemical reaction
- C. Both A & B
- D. Neither A nor B Discuss
- 10. Which plant cell organelle contains its own dna and ribosomes?
Options- A. mitochondria
- B. Chloroplasts
- C. Both A & B
- D. Vacuole Discuss
Biology problems
Search Results
Correct Answer: Adenine & Guanine
Explanation:
The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.
Correct Answer: The ureters are capable of peristalsis like that of the gastrointestinal tract.
Correct Answer: Stomach
Explanation:
Three main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.
Hence, digestion of protein begin in stomach.
Correct Answer: Antidepressants work by stopping the breakdown of norepinephrine, dopamine, and serotonin They're more difficult for people to take than most other antidepressants because they interact with prescription drugs, nonprescription drugs, and some foods
Correct Answer: Replication
Explanation:
The process of copying dna is called Replication.
Correct Answer: mitochondrial inner membrane
Explanation:
The proteins of the electron transport chain are present in mitochondrial inner membrane in Eukaryotes.
Correct Answer: Neurons
Correct Answer: All of the above
Correct Answer: Both A & B
Explanation:
Enzymes are macromolecular biological catalysts. Enzymes accelerate chemical reactions. The molecules upon which enzymes may act are called substrates and the enzyme converts the substrates into different molecules known as products.
Correct Answer: Both A & B
Explanation:
The plant cell organelles, "The power house of the cell" mitochondria and the chloroplasts contains their own DNA and ribosomes.
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