Protiens, Nucleic acids, Chemical evolution and prokaryotic cells, Eukaryotic cell structures and functions Flashcards
Cytochalasin B is a chemical that blocks assembly of actin monomers. Which of the following will be a direct consequence if cells are treated with Cytochalasin B?
Muscle cells won't contract Vesicles will not be transported Nuclear lamina will not function Flagella won't move Cilia won't move
Muscle cells won’t contract
A hypothetical protein Heu, functions as a pentamer. What is the HIGHEST level of structure present in this functional protein? (Note: pentamer - five polypeptides come together to form a functional protein)
Primary
Tertiary
Secondary
Quaternary
Quaternary
Penicillin antibiotics are used to kill bacteria. They do so by specifically blocking formation of cell walls of bacteria. Which of the following present in cell walls is likely blocked by penicillin?
Lipids Cellulose Peptidoglycan DNA RNA
Peptidoglycan
In plants, which of the following structures will a molecule encounter as it travels from the root to inside the central vacuole?
Secondary cell wall Tonoplast All of the structures listed Primary cell wall Plasma membrane
All of the structures listed
Based on the endosymbiont theory, certain cell structures such as ________________________ were primitive Prokaryotes.
Mitochondria and chloroplasts Nuclei and lysosomes Chloroplasts and endoplasmic reticulum Chloroplasts and nuclei Ribosomes and peroxisomes
Mitochondria and chloroplasts
Which of the following is NOT TRUE about the Miller-Urey experiment?
They used gases like NH3, CH4 and H2 in their experiment
Organic compounds including a variety of amino acids were formed in their experiment
Their experiment proved that DNA was the macromolecule that started biological evolution.
Simple molecules were used to form more complex organic molecules
Electrodes were used to simulate lightning
Their experiment proved that DNA was the macromolecule that started biological evolution.
For the RNA sequence given below, write the complementary DNA sequence: 5’-ACUGGACUUAAG-3’
5’-GAATTCAGGTCA-3’ All options are wrong 5’-CTTAAGTCCAGT-3’ 5’-TGACCUGAATTC-3’ 3’-CUUAAGUCCAGU-5’
5’-CTTAAGTCCAGT-3’
In a DNA double helix,_______bond connects two sugars, while______bond connects two nitrogenous bases.
peptide, covalent covalent, phosphodiester ionic, covalent hydrogen, hydrogen phosphodiester, hydrogen
phosphodiester, hydrogen
A plant cell is treated with a stain that binds DNA. In which of the following structures would use see this stain bound DNA?
Nucleus, ER and Golgi Nucleus, mitochondria, chloroplast Ribosomes, cytoplasm and Plasma membrane Golgi, ER and cell wall Mitochondria, ER and peroxisomes
Nucleus, mitochondria, chloroplast
Cells are generally evolved to have an abundance of a particular type of organelle that help their unique function. For the cell below, pick the organelle or cell structure it likely has in abundance.
Macrophage (white blood cell) that engulfs and digests bacteria
Gap junctions
Peptidoglycan
Plasmodesmata
Lysosomes
Lysosomes
Cells are generally evolved to have an abundance of a particular type of organelle that help their unique function. For the cell below, pick the organelle or cell structure it likely has in abundance.
Sperm cells that need energy for movement
Mitochondria
Plasmodesmata
Rough ER
Smooth ER
Mitochondria
Cells are generally evolved to have an abundance of a particular type of organelle that help their unique function. For the cell below, pick the organelle or cell structure it likely has in abundance.
Ovarian cells that produce estrogen (a steroid hormone)
Tight junctions
Lysosomes
Smooth ER
Peptidoglycan
Smooth ER
Cells are generally evolved to have an abundance of a particular type of organelle that help their unique function. For the cell below, pick the organelle or cell structure it likely has in abundance.
Epithelial cells lining the digestive tract to prevent leakage of fluid
Gap junctions
Tight junctions
Mitochondria
plasmodesmata
Tight junctions
Present in large numbers on bacterial cell surfaces; help with attachment to cell
Fimbriae
Present on bacterial cell surfaces; help transfer DNA between bacterial cells
pilli
