Biologia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What is the main material in the cell wall of bacteria?

1. APeptidoglycan
2. BKeratin
3. CCellulose
4. DChitin

What does it mean that a cell membrane is selectively permeable?

1. AIt lets no substance cross at all
2. BIt lets some substances cross but not others
3. CIt lets only water molecules cross
4. DIt lets every substance cross freely in both directions

What is the job of messenger RNA (mRNA)?

1. AIt stores genetic information in the nucleus permanently
2. BIt carries the genetic code from DNA to the ribosomes
3. CIt carries amino acids to the ribosomes
4. DIt forms the main structure of the ribosome

What is a prion?

1. AA bacterium without a cell wall that lives inside nerve cells
2. BA misfolded protein that causes normal proteins to misfold
3. CA fungal spore that infects the brain
4. DA very small virus with a DNA genome

A seedling is 4 cm tall at week 1, 8 cm at week 2, 12 cm at week 3 and 16 cm at week 4. If the trend continues, how tall will it be at week 6?

1. A24 cm
2. B18 cm
3. C32 cm
4. D20 cm

Clostridium tetani grows in deep puncture wounds but is killed by oxygen. How is this bacterium described?

1. AA facultative anaerobe
2. BAn obligate anaerobe
3. CAn obligate aerobe
4. DA photosynthetic bacterium

A restriction enzyme cuts at three sites in a linear piece of DNA. How many fragments are produced?

1. A6
2. B4
3. C2
4. D3

The wings of a bat and the wings of a butterfly are used for flying but have very different structures. What are they called, and what does this show?

1. AHomologous structures, which have the same bones inside
2. BVestigial structures, which no longer have a function
3. CHomologous structures, which were inherited from a shared ancestor
4. DAnalogous structures, which evolved separately for the same job