Question

1. when secretory products are being transported to the cell membrane for export, they

a. move through the cytoplasm.
b. are enclosed in a vesicle.
c. are transported by carrier molecules.
d. diffuse freely through the cytoplasm.

1. which of the following is false?

a. the contents of a lysosome could destroy a cell.
b. the golgi apparatus is a packaging area for cell products.
c. rer is associated with the production and distribution of proteins.
d. when rer loses its ribosomes, it begins to manufacture steroid hormones.

1. cells that engulf and digest foreign bacterial cells could be expected to have lots of

a. nuclei.
b. nucleoli.
c. ribosomes.
d. lysosomes.

1. which of the following structures are not membranous organelles?

a. vesicles.
b. ribosomes.
c. lysosomes.
d. mitochondria.

1. which of the following structures contains genetic information?

a. polysomes.
b. ribosomes.
c. lysosomes.
d. chromosomes.

1. what type of biochemical are flagella and cilia composed of?

a. lipids.
b. proteins.
c. nucleic acid.
d. carbohydrates.

1. cells with lots of vesicles could logically be expected to contain

a. golgi apparatus.
b. rough endoplasmic reticulum.
c. smooth endoplasmic reticulum.
d. all of these answers could be correct.

1. which sequence of cell parts given below is most closely associated with protein secretion?
2. vesicle
3. cell membrane
4. golgi apparatus
5. rer

a. 4, 1, 2, 1, 3
b. 2, 1, 3, 1, 4
c. 4, 1, 3, 1, 2
d. 4, 3, 1, 2, 1

1. choose the false statement from among the following.

a. photosynthesis takes place in chloroplasts.
b. ribosomes are the centers of protein synthesis.
c. mitochondria are the sites of cellular respiration.
d. the nuclear envelope is a non - porous barrier between the nucleoplasm and cytoplasm.

Explanation:

1. Secretory products are transported in vesicles.
2. When RER loses ribosomes, it becomes SER (smooth endoplasmic reticulum) which is involved in lipid synthesis, not steroid hormone synthesis (steroid hormones are lipids but the statement is about the change from RER to SER and the function after losing ribosomes).
3. Lysosomes are involved in phagocytosis and digestion of foreign materials.
4. Ribosomes are non - membranous organelles.
5. Chromosomes contain DNA which has genetic information.
6. Flagella and cilia are made of proteins (microtubules which are proteinaceous).
7. Golgi apparatus is involved in vesicle formation for secretion.
8. Protein secretion sequence: RER (not in the given options, but if we consider the options given, RER is associated with protein synthesis. Then proteins go to Golgi apparatus (4), then in vesicles (1), then to cell membrane (2). But the correct sequence for protein secretion is RER → Golgi apparatus → vesicle → cell membrane. Since RER is not in the options, assuming it's a typo and they mean starting from Golgi (maybe a mis - numbering).
9. The nuclear envelope is porous (has nuclear pores).

Answer:

1. B
2. D
3. D
4. B
5. D
6. B
7. A
8. C (assuming RER is implied as the start for protein synthesis, then 4 (Golgi), 1 (vesicle), 2 (cell membrane). But if we consider the given numbers only, and assume a mis - representation, the closest is C. 4,1,3,1,2 is wrong. 4 (Golgi) modifies proteins, packages them into vesicles (1), vesicles fuse with cell membrane (2). But the correct biological sequence is RER → Golgi → vesicle → cell membrane. If we assume RER is not in the options and start from Golgi (maybe a mis - question setup), then 4 (Golgi) → 1 (vesicle) → 2 (cell membrane). But the option C is 4,1,3,1,2 which is incorrect. However, if we consider that maybe the first number is a mis - print and it should be RER (not in options) and then Golgi (4), vesicle (1), cell membrane (2). But among the given options, C is 4,1,3,1,2 which is wrong. But if we assume it's a mis - numbering and they mean 4 (Golgi) → 1 (vesicle) → 2 (cell membrane), then C is the closest (even though the 3 is extra. Maybe it's a typo in the question).
9. D