Question

multiple choice section. select most correct answer. 1. an organelle with folding membranes is dotted with ribosomes that are attached to the nuclear membrane and appearance with ribosomes that give it a rough a) rough endoplasmic reticulum b) smooth endoplasmic reticulum c) nuclear membrane d) cell or plasma membrane 2. this organelle surrounds the nucleus and retains chromatin or dna within its boundaries a) cytoplasm b) cytoskeleton c) nuclear membrane d) cell membrane 3. organelle found in plants that contains large amounts of water and stores important material for the cell. a) lysosomes b) vacuoles c) ribosomes d) cytoplasm 4. a flattened, layered, sac - like organelle that resembles stack of pancakes. it is responsible for shipping and sorting proteins and carbohydrates for export out of the cell. a) chloroplast b) golgi body c) mitochondria d) microtubules 5. clear, thick, jellylike material found inside the cell membrane, it supports and protects cell organelles a) chromosome b) vacuole c) cytoskeleton d) cytoplasm 6. the small, specialized membrane - bound structures within eukaryotic cells are called a) organs b) organelles c) cytoskeleton d) cell membrane proteins 7. most multicellular organisms that have membrane - bound organelles are called a) eukaryotes b) organelles c) prokaryotes d) cell membrane 8. the flexible membrane boundary between the cell and its environment is called the a) organelles b) prokaryotes c) eukaryotes d) cell membrane 9. dna is known to be floating freely and not surrounded by a nuclear membrane in a) prokaryote cell b) plant cell c) animal cell d) all the cells 10. the cell wall is absent from a) prokaryotic cell b) plant cell c) animal cell d) eukaryotic cells 11. the code of life or dna is found in a) only in eukaryote cells b) only in prokaryote cells c) both eukaryote and prokaryote cell 12. the organelle found only in animal cells are a) chloroplasts b) centrioles c) nucleolus d) cytoskeleton 13. which of the following is a function of the cytoskeleton? a. helps a cell keep its shape b. surrounds the cell c. contains dna d. helps make proteins

Explanation:

1. Rough endoplasmic reticulum has ribosomes attached and folded membranes.
2. Nuclear membrane surrounds nucleus and contains chromatin/DNA.
3. Vacuoles in plants store water and important materials.
4. Golgi body is a flattened, layered, sac - like organelle for shipping proteins and carbohydrates.
5. Cytoplasm is clear, thick, jelly - like material inside cell membrane.
6. Organelles are small, specialized membrane - bound structures in eukaryotic cells.
7. Eukaryotes are multicellular organisms with membrane - bound organelles.
8. Cell membrane is the flexible boundary between cell and its environment.
9. Prokaryotic cells have DNA floating freely without a nuclear membrane.
10. Animal cells lack a cell wall.
11. DNA is found in both eukaryotic and prokaryotic cells.
12. Centrioles are found only in animal cells.
13. Cytoskeleton helps a cell keep its shape.

Answer:

1. a. rough endoplasmic reticulum
2. c. nuclear membrane
3. b. vacuoles
4. b. Golgi body
5. d. cytoplasm
6. b. organelles
7. a. eukaryotes
8. d. cell membrane
9. a. prokaryote cell
10. c. animal cell
11. c. both eukaryote and prokaryote cell
12. b. centrioles
13. a. helps a cell keep its shape