4. Which of the following statements does not apply to the nuclear envelope? a.

Question

4. Which of the following statements does not apply to the nuclear envelope? a. It is a double membrane. b. It has pores through which material enters and leaves. c. It is continuous with the endoplasmic reticulum. t has infoldings to form cristae. 5. Some proteins are found in the plasma membrane. What part of the protein is within the membrane itself? a. hydrophilic region b. hydroponic region hydrophobic region d. hydrocoel region 6. What is the simplest level of packing of the eukaryotic chromosome? a. the nucleolus b. the nucleoidrthe nucleosome d the nucleoplasm sgsomes-are formed by buddling fromwhich coffutar organelle? a. smooth endoplasmic feticulum b. Golgrapparatus c. rough endoplasmic reticulum d, nucleus 7. All peroxisomes carry out this function a break down fats and amino acids into smaller molecules that can be used for energy production by mitochondria b digest macromolecules using the hydrolytic enzymes they contain c synthesize membrane components such as fatty acids and phospholipids d. control the flow of ions into and out of the cell

Explanation / Answer

Answers:-

4:- d) it has foldings to form cristae.

Explanation:- nuclear membrane is double membranous in nature but it does not form foldings and do not have cristae like mitochondria. Also it has pores and continuous with endoplasmic reticulum, So option d is not apply on nuclear membrane.

5:- c) Hydrophobic region

Explanation:- proteins found in membrane has two regions hydophobic and hydrophilic. The region which is inside the membrane is hydrophobic region which interact with hydrophobic core of the membrane and other hydrophilic region is outside the membrane.

So hydrophobic region is correct answer.

6:- c) nucleosome

Explanation:- Simplest level of packing of eukaryotic chromosome is nucleosome. It consists of histone octamer formed of two copies of each H2A, H2B, H3 & H4. Around this molecule DNA is wrapped to form nucleosome.

7:- a) break down fats and amino acids into smaller molecule that can be used for energy production by mitochondria.

Explanation:- Peroxisomes breakdown fatty acids by beta-oxidation in which long chain of fatty acids is converted into medium chain in the mitochondria. So it help for the energy production by mitochondria.

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