DNA and Cells Questions
DNA and Cells Questions
Q 1 true or false
1-A nucleosome is DNA wound around a protein core of eight histone molecules .
2- RNA polymerase catalyzes the production of a strand of RNA from DNA .
3-A ribosome consists of two subunits .
4-A single codon consists of 3 nucleotides.
5- Ribosomal subunits are made of proteins and ribosomal RNA.
6- DNA packing/unpacking occurs outside of the nucleus.
7- Transcription occurs in the cytoplasm of eukaryotic cells.
8- RNA ligase marks the end of a gene and causes transcription to stop.
9- Any change in the nucleotide sequence of DNA is called a mutation .
10- The transfer of genetic information from DNA to RNA is called translation
11- The greatest annual input and least seasonal variation in solar radiation occurs in the tropics .
12- Photosynthesis consumes CO 2 and cellular respiration consumes O 2
13- Phospholipids are completely hydrophobic.
14- A protein that becomes denatured no longer functions .
15- The adaptations of pronghorns to open country could be a disadvantage in a densely forested environment .
16- Cell division is common in eukaryotes but rare in prokaryotes
17 – Cells facilitate an increase in the order of the surrounding environment .
18- The expressed physical traits of an organism are called its phenotype.
19- Dehydration reactions are involved in the formation of macromolecules
20- Electron carriers play a role in energy conversion within the cell.
Q 2 Match the definition
Chlorophyll,Nucleus ,Primary consumer ,Chloroplast , Diploid ,Stomata, Secondary consumer ,Homologous Chromosomes ,Mitochondrion ,Zygote
Operon ,Gene expression, Promoter , Transcription Factors , Activator ,Nucleosome, Operator ,Gene regulation ,Repressor
1-A genetic “switch ” in prokaryotes that determines whether the RNA polymerase can attach to the promoter and start transcribing genes .
2- A protein that blocks the transcription of a gene or operon
3- How genetic information flows from DNA to proteins or the flow of genetic information from the genotype to the phenotype .
4- A protein that switches on a gene or a group of genes.
5- In prokaryotes, a cluster of genes with related functions . along with the promoter and operator that control their transcription
6- A gene that codes for a protein , such as a repressor that controls the transcription of another gene or group of genes .
7- In the eukaryotic cell, a protein that functions in initiating or regulating transcription. They bind to DNA or to other proteins that bind to DNA
8- A specific nucleotide sequence in DNA located near the start of a gene that is the binding site for RNA polymerase and the place where transcription begins .
9- The turning on and off of genes within a cell in response to environmental stimuli or other factors
10- A structure associated with DNA packaging , consisting of DNA wound twice around a protein core of eight histone molecules .
11- An organelle that absorbs sunlight and uses it to drive the synthesis of organic compounds from carbon dioxide and water
12- Microscopic pores surrounded by guard cells in the epidermis of the leaf that facilitates gas exchange .
13- An animal that eats herbivores ,
14- Two chromosomes that make up a matched pair in a diploid cell .
15- The diploid fertilized egg , which results from the union of a sperm cell nucleus and an egg cell nucleus .
16- An herbivore an organism that eats plants or other autotrophs .
17 – The organelle of a eukaryotic cell that contains the genetic material in the form of chromosomes , made of chromatin .
18- a sexually reproducing organism . a cell containing two homologous sets of chromosomes .
19- An organelle in eukaryotic cells where cellular respiration occurs . Enclosed by two membranes it is where most of the cell’s ATP is made .
20- A green pigment located within the chloroplasts of plants and algae and in the membranes of certain prokaryotes .
Q3
The members of this group produce their own food through photosynthesis.
Is this group a kingdom or a domain?
What is the name of this kingdom or domain ?
Q4 These mostly single -celled organisms include the Amoebas . They are microscopic , but their cells contain membrane -enclosed organelles . Scientists group them into multiple because their evolutionary relationships are still being assessed .
Is this group a kingdom or domain ?
What is the name of this kingdom or domain ?
Q5 The members of this group are decomposers .
Is this group a kingdom or a domain ?
What is the name of this kingdom or domain ?
Q6 These microscopic organisms are made of simple cells . They live just about everywhere , and there are practically innumerable species of them .
They even live on and Inside you ! Is this group a or a domain?
What is the name of this kingdom or domain ?
Q7 How are RNAs involved in translation? What is the special name for the RNAs that are involved in translation? Explain
Q8 These are microscopic organisms made of simple cells . They are found the more extreme
environments on the planet .
Is this group a kingdom or a domain ?
What the name of kingdom or domain? DNA and Cells Questions
