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Flashcards in I - Cell Biology Deck (92)
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1

Command center of the cell

nucleus

2

The outer nuclear membrane is continuous with

endoplasmic reticulum

3

Most abundant form of chromatin

euchromatin

4

Site of DNA Transcription

nucleus

5

Responsible for ribosomal RNA synthesis

nucleolus

6

Transcriptionally inactive chromatin

heterochromatin

7

Complex of DNA, histone and non-histone proteins

chromatin

8

Barr Bodies are _____chromatin.

heterochromatin

9

Allows passage of nuclear substances to the cytoplasm

nuclear pore

10

Nucleolus: Maturing Ribosomes

pars granulosa

11

Nucleolus: Active Zone

pars fibrosa (dense fibrillar zone)

12

Nucleolus: Inactive DNA

fibrillar center

13

The nucleus is the site of DNA replication and transcription of DNA in

precursors of RNA molecules

14

Contains all enzymes required for replication and repair of newly synthesized DNA

Nucleus

15

Double stranded helical molecule that carries genetic information of the cell

DNA

16

Histone proteins are _____ charged.

positive

17

Important in forming the nucleosome and solenoid fibers in chromatin

histones

18

Basic repeating unit of the chromatin fiber

nucleosome

19

Non-histone proteins contain enzymes involved in

nuclear functions

20

Chromatin: condensed, dark, inactive, Barr bodies

heterochromatin

21

Chromatin: dispersed, light, actively transcribed

euchromatin

22

Organelles: contains their own set of DNA

mitochondria

23

Site of post-translational modification

golgi apparatus

24

Sequestration and release of Ca in striated muscle

sarcoplasmic reticulum

25

Organelles: contains large and small subunits

ribosomes

26

Organelles: synthesis of steroid hormones, phospholipids and TG

smooth endoplasmic reticulum

27

Organelles: protein sorting and packaging

golgi apparatus

28

Organelles: synthesis of secretory proteins, membrane bound and lysosomal enzymes

rough endoplasmic reticulum

29

Organelles: production of CoA, TCA, beta-oxidation, oxidative phosphorylation

mitochondria

30

Organelles: contains inner and outer membranes

mitochondria