Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

Organizm ma genotyp Bb. Jak się go określa?

1. AHomozygotyczny dominujący
2. BHaploidalny
3. CHeterozygotyczny
4. DHomozygotyczny recesywny

What is the job of the capsule found around some bacteria?

1. AIt is used to swim through liquids
2. BIt protects the cell, for example from white blood cells
3. CIt holds the bacterium's main chromosome
4. DIt helps the bacterium make energy by photosynthesis

What are the three parts of a nucleotide?

1. AA glycerol, a phosphate and a fatty acid
2. BAn amino group, a sugar and a fatty acid
3. CA phosphate, a sugar and a nitrogen base
4. DA carboxyl group, a base and a lipid

In a eukaryotic cell, where does transcription take place?

1. AOn ribosomes in the cytoplasm
2. BIn the lysosomes
3. CIn the nucleus
4. DIn the Golgi apparatus

Which is the correct way to write the scientific name of the gut bacterium?

1. Acoli Escherichia
2. BEscherichia Coli
3. CEscherichia Coli
4. DEscherichia coli

In a food chain, producers hold 10 000 units of energy. Roughly how much is passed on to the primary consumers?

1. AAbout 10 units
2. BAbout 1000 units
3. CAbout 10 000 units
4. DAbout 5000 units

Why is one new DNA strand made in short pieces (Okazaki fragments) during replication?

1. AOnly half of the DNA needs to be copied
2. BDNA polymerase works only 5' to 3', and the strands are antiparallel
3. CHelicase cuts that strand into pieces before copying
4. DThe lagging strand is made of RNA instead of DNA, so it must be built in pieces

An Rh-negative mother gives birth to an Rh-positive baby. Why could a later Rh-positive pregnancy be at risk?

1. AThe second baby will be unable to make any red cells
2. BHer red cells may become Rh positive after the birth
3. CThe first baby's antibodies remain in her blood and attack her
4. DShe may have made anti-D antibodies that cross the placenta