24. What\'s the name of the big organelle big organelile viewed under a microsco
ID: 281876 • Letter: 2
Question
24. What's the name of the big organelle big organelile viewed under a microscope? appears empty when that appears in the middle of mosu a. large central vacuole c. nucleus d. cell wall ?25, what is the function of a nucleolus? a. to produce proteins c to guard against mutations b. to produce messenger RNA d. to produce ribosomal RNA 26. What kinds of molecules can pass easily through a biological a. lipids and carbohydrates c. proteins and nucleic acids b. ions and d. HO and small non-polar -27. Which direction does a solute move during facitated diffusion? b. down a concentration gradient d. out of the cell a. into the cell C. up a concentration gradient 28. Gaps in the cell walls of adjacent plant cells that provide a the cells are: d. gap junctions a plasmodesmata b.tight junctions cnuclear pores 29. Reactions that must always occur together are said to be: b. codependent interdependent d. deterministic a. coupled 30. Animal cells secrete proteins, sugars, and minerals that affect the cell's immediate surroundings. This material is called the a. epidermis b. endodermis c. extracellular matrix d. cell wall 31. Describe the effect of substrate concentration on the rates of enzymatic reactions a. reaction rate increases with substrate concentration at low concentrations, but not high b. reaction rate increases with substrate concentration at high concentrations, but not low c. reaction rate increases with substrate concentration at all concentrations d. there is no effect of substrate concentration on reaction rates 32. Energy cannot be created or destroyed, statement is known as: but only changed from one form to another. This a. the law of entropy c. the 20d Law of Thermodynamics b. the 1 Law of Thermodynamics d. the theory of energyExplanation / Answer
24. Option A is correct.
A large central vacuole is present in amature plant cell.
25. Option D is correct.
The nucleolus is the site of ribosomal RNA synthesis.
26. Option A is correct.
Hydrophobic molecules such as lipids and small carbohydrates can pass through the membrane. (Carbohydrates ?)
27. Option B is correct.
During facilitated diffusion, a solute is moved down its concentration gradient.
28. Option A is correct.
Plasmodesmata are the cytoplasmic strands that provide connections between adjacent cells.
29. Option A is correct.
Coupled reactions occur together.
30. Option C is correct.
31. Option A is correct.
32. Option B is correct.
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