Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

What is a pedigree in genetics?

1. AA picture of a person's chromosomes arranged in pairs by size
2. BA chart that shows how a trait is inherited in a family
3. CA list of all the genes in an organism
4. DA table of codons and amino acids

Kokios formos yra DNR molekulė?

1. ADviguba spiralė
2. BTrigubė spiralė
3. CPlokščias žiedas
4. DViena tiesi grandinė

Which piece of equipment gives the most precise measurement of a liquid volume?

1. AA test tube
2. BA graduated cylinder
3. CA beaker
4. DA Petri dish

Kuo sotieji riebalai skiriasi nuo nesotųjų riebalų?

1. AJie turi daug dvigubų ryšių ir kambario temperatūroje yra skysti
2. BJie lengvai tirpsta vandenyje
3. CJie turi azoto ir sudaro baltymus
4. DJie neturi C=C dvigubų ryšių ir paprastai yra kieti

Kas yra kodonas?

1. ABaltymas, pradedantis transkripciją
2. BTrijų iRNR bazių grupė, koduojanti vieną aminorūgštį
3. CChromosomos dalis, prie kurios mitozės metu prisitvirtina verpstės siūlai
4. DViena bazė, koduojanti baltymą

Why does PCR use a DNA polymerase taken from bacteria that live in hot springs?

1. AIt copies RNA as well as DNA
2. BIt survives the high temperatures used to separate the strands
3. CIt makes the DNA strands stick together
4. DIt works only in the dark, like the bacteria it comes from

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. ABacteria take up any radioactive substance
2. BProtein, not DNA, is the genetic material of the virus
3. CViruses contain no DNA at all
4. DDNA, not protein, is the genetic material of the virus

A large molecule contains carbon, hydrogen, oxygen, nitrogen and phosphorus. Its monomers each have a sugar and a base. What type of molecule is it?

1. AA nucleic acid
2. BA protein
3. CA lipid
4. DA carbohydrate