Cell structure 2

Question 1

How thin is the cell surface membrane?

Answer 1

about 7nm

Question 2

What is the cell surface membrane made of?

Answer 2

by the phospholipid bilayer made of phospholipid and proteins

Question 3

What are the materials leaving the nucleus?

Answer 3

mRNA, tRNA, ribosomes for protein synthesis

Question 3

What are the materials leaving the nucleus?

Answer 3

mRNA, tRNA, ribosomes for protein synthesis

Question 4

What are the materials entering the nucleus?

Answer 4

proteins, nucleotides, ATP, and hormones such as thyroid hormone

Question 5

What is a chromatin a combination of?

Answer 5

DNA and proteins (histones)

Question 6

What does the genes contain in making ribosomes?

Answer 6

code for the rRNA + tRNA

Question 7

What is found around the core of a nucleus?

Answer 7

a less dense regions where the ribosomal subunits are assembled combing the rRNA with ribosomal proteins imported from the nucleus

Question 8

what happens to the nucleolus during division?

Answer 8

it disappears

Question 9

Function of vacuoles

Answer 9

Support
Lysosomal activity
Secondary metabolism
Food reserves
Waste products
Growth in size