which of these structures contains RNA but not DNA?
Respuesta
mitochondrion
ribosome
nucleus
chloroplast
Pregunta 2
Pregunta
what is the function of the Golgi apparatus?
Respuesta
to synthesise ATP
to make proteins from amino acids
to aid endocytosis
to make secretory products
Pregunta 3
Pregunta
what is the name of the structures which penetrate the walls of adjacent plant cells?
Respuesta
plasmodesmata
middle lamellae
pits
channels
Pregunta 4
Pregunta
cells in a culture will absorb amino acids from the surrounding culture medium. If radioactively labeled glycine is provided in the culture medium, in which organelle will radioactivity be found first?
Respuesta
nucleus
ribosomes
lysosomes
Golgi apparatus
Pregunta 5
Pregunta
what resolution does a light microscope have?
Respuesta
20μm
2μm
0.2μm
0.02μm
Pregunta 6
Pregunta
which of these cell structures does not have an envelope?
Respuesta
nucleus
mitochondrion
chloroplast
lysosome
Pregunta 7
Pregunta
what are observable "brush borders" found on intestinal epithelial cells?
Respuesta
cilia
villi
microvilli
flagella
Pregunta 8
Pregunta
which of the following is concerned with the synthesis and transport of lipids and steroids in the cell?